Field Report: Mamiya 300mm f/2.8 APO and Mamiya 500mm f/4.5 APO Lenses in Costa Rica

Image taken with the Mamiya 500mm f/4.5 APO lens with the Mamiya M645 2x N TC Teleconverter and PhaseOne IQ180 of a Tucan in Costa Rica

Mamiya 500mm f/4.5 APO + Mamiya M645 2x N TC @ 1000mm f/9 on PhaseOne IQ180

First of all, I would like to thank all of you who have tuned and read my website making the past 4 months all record setting months for my website. I will also update you on what to expect in the near future. This review will be a field report looking at practically shooting the Mamiya 300mm f/2.8 APO and my newly acquired Mamiya 500mm f/4.5 APO lenses along with extension tubes, and the Mamiya M645 2X N teleconverter in Costa Rica. The next review which will more then likely pop up will be a look at the new PhaseOne Schneider-Krueznach 2x Teleconverter which we will look at on the 3 recommended PhaseOne lenses as well as on the hallowed telephotos which are the subject of this report; we will judge whether this new SK engineered 2x Teleconverter is worth the ~$2,000.00 USD price tag and how it compares to the M645 2X N. After this I hope to have two or three more reviews coming in the next couple of months. The first of these will be a full review with sample images and aperture series of the Mamiya 500mm f/4.5 APO lens in the style of my Mamiya 300mm f/2.8 APO lens review. Then there will be comparison between all of the Mamiya 300mm telephotos lenses, these include the Mamiya 300mm f/2.8 APO, Mamiya 300mm f/4.5 645-AF, Mamiya 300mm f/5.6 ULD N, Mamiya 300mm f/5.6 C and the Mamiya 150mm f/2.8 with the 2x TC to make another more compact 300mm f/5.6 option. There will also be a comparison looking at the Mamiya 500mm lens options which include the Mamiya 500mm f/4.5 APO, Mamiya 500mm f/5.6 C, and the Mamiya 500mm f/8 Reflex lens. This will round out all of the Mamiya telephoto options and hopefully make my website the internet leading source of information on these particular lenses. Along with a few other minor articles this should then bring us to PDN time, and if I can acomplish all of this in that time I will be shocked, but pleased. For now however, we will turn our attention to my shooting experiences with these two title lenses in Costa Rica…


The Mamiya 500mm f/4.5 APO is possibly the rarest of the Mamiya lenses (if you don’t count the 500mm f/8 Reflex and 110mm f/2.8 “N” which most people don’t) it holds the title as the undisputed heavy weight champion of the Mamiya lens lineup past and present. However, it is vastly different to the experience you will get from strapping a 500mm lens to the front of your 35mm DSLR since this is a 500mm lens for medium format. This 500mm lens equates to a 320mm lens on a 35mm camera system making it the baby end of the telephoto spectrum by 35mm standards but enormous by medium format standards, if you add the Mamiya M645 2x N TC then you work your way up to a 1000mm lens which is equivalent to a 642mm lens on 35mm . Though, admiralty there are at-least a few lenses which best it which include the somewhat manageable Pentax 67II 800mm f/6.7 ED (IF), the super-human Pentax 67 800mm f/4 Takumar, and finally the Carl-Zeiss 1700mm f/4 telephoto lens which warrants its own 2 ton Mercedes-Benz G-Wagon to carry it around. But I digress, we return to the world of Mamiya where we have the wide-apertured Mamiya 300mm f/2.8 APO and the Mamiya 500mm f/4.5 APO.

First, I will discuss some requisite peripherals for embarking on an adventure such as this with these two lenses and a PhaseOne IQ180. Unfortunately, some of these peripherals I did not bring along, and this made shooting slightly more difficult, though not impossible it is without a doubt that they could have improved this process greatly. Most obviously, you will need to support these lenses, so I brought along my sturdy Gitzo carbon fiber tripod and monopod. It is very practical to shoot the 300mm f/2.8 APO with the monopod, though it is near impossibly to achieve this with the 500mm. The 300mm f/2.8 APO has a decently close minimum focus distance and this is aided significantly with the use of extension tubes (we will address this below) which makes it feasible to use with a monopod. For use with the 300mm f/2.8 APO, I already had purchased a Wimberley Head for some reason I opted for the side-mount version, though truthfully I have absolutely no idea why since it makes mounting the lenses significantly more difficult and dangerous. Frankly, now that I think about it I really should order their adapter kit to make the side-mount into the regular mount. But anyway, This worked excellently with the 300mm f/2.8 APO and it works just as well with the 500mm f/4.5 APO balancing it and making it very easy to shoot and lock down. Unlike most other larger telephoto lenses the Mamiya 500mm f/4.5 APO relies on a single threaded tripod mount. This makes finding an Arca-Swiss style adapter plate to work with it very difficult. What I wound up doing was purchasing a RRS AS mounting rail, placing one screw in the hold on the lenses tripod collar and then using two small brackets (which slide into the RRS A/S mounting plate)  on the front and back of the lens foot to secure it in place. This was a capital idea and it held the lens sturdy throughout my adventures with it. The other most notable accessory that you will need to have is the shutter-release cable. Though in good light situations you certainly can get away without needing it; when you use the 2x TC and are at 1000mm or at slower shutter-speeds locking down the head and using the shutter-realease cable are absolutely required for getting sharp images, along with using mirror-up mode along with these precautions round out the proper long lens shooting technique for this lens.

Now we will address the things which I neglected to bring along with me for this adventure. The economic principle / phenomenon / assumption of non-satiation suggests that we always want more then we have, and if we have the ability to get more then we always will. I knew this going into my medium-format digital telephoto adventures and began to devise a plan to prepare for this. I knew, ,with my PhaseOne IQ180′s 80mp full-frame 645 sensor that I could crop to 40mp, 30mp or 20mp and still have a tolerably clean image. This essentially told me that I had some extra teleconverters “built-in” to my sensor and that I should plan for that. I devised a plan to have a special focusing screen made with an etched outline for a 40mp crop and then I would use the Mamiya 2x Viewfinder magnifier to account for this and, when looking through the viewfinder compose everything presuming this 2x crop (or so I thought). As it turns out to get to 40mp is less then a 2x crop (do the math you’ll figure it out) and the 2x magnifier only magnifies the center of the viewfinder image and does not offer full coverage at 2x.Through the process of looking into these items I learned from Bill Maxwell, that it is possible for you to create a focusing screen which is specially formulated for telephoto lenses within a certain focal length and aperture range. Unfortunately I did not do this, though I am considering either buying a used 645AFD or DF body and having this conversion done (it also requires recalibrating the focusing system of the body), I did not have it done for this trip. This was no big deal, but it is possible that this could have helped me with my efforts to make clean, sharp, in focus images with these lenses. After dismissing this idea I discarded the 2x magnifier to sit at home with other accessories thinking that it could offer me nothing on this trip. However, I did not consider the fact that its still a 2x magnifier and it could have greatly helped me with achieving sharp focus, especially with far-away subjects. But alas you cannot have everything. Now we will look at some sets of images taken in varying locations and of varying subjects and see what they can reveal to us about these lenses.

First we will look at some applications for the Mamiya 300mm f/2.8 APO lens along with extension tubes to see what it can and cannot do;

Mamiya 300mm f/2.8 APO lens shooting a Poison Dart Frog in Costa Rica with Extension Tubes

Mamiya 300mm f/2.8 APO with Extension Tubes on PhaseOne 645DF + PhaseOne IQ180

The shot above is a crop (see below) of an image taken with the Mamiya 300mm f/2.8 APO and extension tubes of a Poison Dart Frog in the rainforest. This image exemplifies a critical failure in the use of this lens. It was in no way suited to this task for a number of reasons and the resulting image demonstrates that. This image was taken with the Mamiya 300mm f/2.8 APO lens, extension tubes, and monopod. This was in a very dark rainforest, the lens could not focus close enough so the extension tubes ate light and the shallow DoF and tiny subject made it very difficult to achieve any sort of tolerable quality shot with it. The best lens that could have been used in this situation would have been the Mamiya 120mm f/4 D Macro lens (Preferably MF since it offers precise control which would have inured to my benefit over the newer AF version in this case)  on a tripod since it would supply close focus and a decent aperture. Another way that this could have possibly been saved was using the M645 -> Nikon camera adapter (a desperate move I concede) along with the 2X TC and a high-ISO on the Nikon D4 which might have yielded a higher-quality image. This resulting image is an extreme crop of the original image;

Screenshot from PhaseOne CaptureOne of an image taken with the PhaseOne IQ180 and Mamiya 300mm f/2.8 APO lens of a poison dart frog in the rainforest of Costa Rica

The camera was decently stabilized and surprisingly the shutter speed of 1/80th of a second was not the primary issue with this capture. The 200 ISO combined with a crop (which will show any flaws of a high-iso shot) killed the image. It was also initially fairly underexposed so compensating for the exposure also further helped to bring out the noise and loss of sharpness due to the ISO. Admiralty as much as I can run down this image, I do like it since, hey, I haven’t shot poison dart frogs. It was very fun and definitely a learning experience.

Moving onward and upward we will now look at a series of images, again taken with the Mamiya 300mm f/2.8 APO lens with varying combinations of extension-tubes and teleconverters to capture different perspectives of the first (of many) lizards I will now bring to your attention.

Image taken with the Mamiya 300mm f/2.8 APO lens and PhaseOne IQ180 in Costa Rica Rainforest

Mamiya 300mm f/2.8 APO lens with extension tubes and Mamiya M645 2x N TC @ 1/200 – f/5.6 -ISO 200

This image is also a crop, taken at ISO 200 with the Mamiya 300mm f/2.8 APO lens. This first image employed both the teleconverter and extension tubes to allow me to get in tight-enough to the subject (framing wise) and allow me to have a close focus distance to work in tandem with the TC for attempting to achieve the framing that I wanted. The full image, is actually rather decent as well, though this crop is my preferred rendering of the image. Even though there is noise, because the image was taken at ISO 200, and it is a crop this is not an issue since the majority of the image is taken up by the lizard which has a great deal of sharply rendered micro-detail in its skin which eats up most of the apparent noise. The Mamiya 300mm f/2.8 APO lens proves here once again, that it is an absolutely stunningly sharp lens even when being shot wide open and under the intense scrutiny of a cropped image. Noise is a small issue in the background, though at least for me it is not overwhelming and frankly I am distracted by the large beautiful bokeh. Some noise is apparent in the darks of the foreground, though I suspect if this image is printed the background noise and foreground shadow noise will be non-issues.

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Mamiya 300mm f/2.8 APO lens with extension tubes and Mamiya M645 2x N TC @ 1/250 – f/5.6 -ISO 200

This next image further goes to show the ISO quality of the PhaseOne IQ180 when being shot at a relatively “high” ISO for medium format. Again, this image was shot at ISO 200 however it is very low in noise and very high in detail. I do not mean to say that there is no noise present, but certainly it is not an issue. When I purchased my first MFDB, the Hasselblad H3Dii-39ms basically for anything other then a black and white shot, as far as I was concerned anything above ISO 100 (i.e ISO 200) was unusable and unacceptable. This image, again utilized both the Mamiya M645 2X N TC and the extension tubes on the Mamiya 300mm f/2.8 APO lens. As we can see at this constricted FoV achieved with a 600mm focal length the bokeh is even more gorgeous then it is when this lens is shot at 300mm and f/2.8 and I am very pleased with this image.

The next image that we are going to look at were taken with the Mamiya 300mm f/2.8 APO lens and all three of the extension tubes in the set which means that we are able to get very, very close to our subject. However it also brings in its own set of difficulties to work with as a set-up.

Image taken with the Mamiya 300mm f/2.8 APO lens on my phaseOne iq180 of a lizard in Costa Rica

Mamiya 300mm f/2.8 APO Lens with All 3 Extension Tubes @ 1/250 – f/2.8 – ISO 200

This image was taken using all three of the Mamiya M645 extension tubes on the Mamiya 300mm f/2.8 APO lens. This means that the already very thin depth of field when shooting this lens at f/2.8 becomes even more pronounced since you are working at closer focusing distances. Obviously, with this many extension tubes focus at infinity has already flown out the window but, really, that does not matter since why would you need extension tubes if you were going to be focusing at infinity (hint: you wouldn’t). To get to this final image there were easily 100 shots of this same scene (Lizards don’t really move very rapidly or often if unprovoked) to get an image where critical focus was on the eye of the lizard. In the field it was very difficult to determine whether I was achieving critical focus at my desired point.These images were shot on the monopod, which is much, much easier and comfortable then carrying the lens on a tripod for obvious reasons. However, the tripod (which was approximately 20 feet behind me in the car) would have helped greatly since it would’ve taken my movement out of the equation. This was an issue I discussed when shooting the Mamiya 80mm f/1.9 N in my last review and the same issue arises here as well. This was a situation where I wished I had the 2x magnifier for the viewfinder so I could get a better idea of my critical focus. It should also be noted that there is no significant vingetting or any real issues resulting from using the Mamiya 300mm f/2.8 APO with all of its extension-tubes at once. It may just be me, but it seems that the Out of focus part of the foreground and the near background seem to be swirling a little bit but this might be something that I have not noticed about this lens since this is using it very tightly as almost a long macro lens. All and all I am still very happy with this image. The eye is the point of critical focus and if you zoom in on it you can see me and the car in the background ;) .

Now we will depart from the world of the Mamiya 300mm f/2.8 APO and its accessories and travel for a time through the world of the Mamiya 300mm f/4.5 APO autofocus lens. Shooting difficult lenses like the Mamiya 300mm f/2.8 APO and 500mm f/4.5 APO with only having the option of manual focus really makes you appreciate that novel photographic innovation; autofocus. Its refreshing to take a small respite from the give and take battle of wide-aperture medium format telephoto manual focusing and just use an autofocus lens, and as we know the Mamiya 300mm f/4.5 APO is a stunner at that.

Mamiya 300mm f/2.8 APO lens with extension tubes on PhaseOne 645DF and PhaseOne IQ180 in Costa Rica Rainforest capturing lizard

Mamiya 300mm f/4.5 APO @ 1/100 – f/4.5 – ISO 200

Unfortunately this image is a little bit blurry since the Lizard was moving and a slightly slower shutter-speed was utilized, however I like this image in-spite of its flaws. It is in my opinion wonderfully composed showing the branch that our lizard is climbing on and even though the Mamiya 300mm f/4.5 APO has a smaller aperture, the background is wonderfully blown out and adds to the sense of curiosity and other-worldliness which the cocked head of the lizard is displaying as he hesitates for a moment with his left front and back feet raised. At normal viewing distances and for a smaller print, I have no doubt that the slight motion blur of the image will go unnoticed.

image of a lizard shot in guanacaste national park in Costa Rica

Mamiya 300mm f/4.5 APO @ 1/160 – f/4.5 – ISO 100

Before I went all out and broke out the Mamiya 300mm f/2.8 APO for this little guy I tried some shots with the 300mm f/4.5 APO, this was, in fact handheld and the image still came out excellently, so go me I guess. Of course we can see, this is about as close as we could get with the Mamiya 300mm f/4.5 APO’s close focusing distances (more or less I’m guessing since I don’t remember but it seems about right) and I was able to get a nice composition of the lizard within the “V” shape of the two trees with some background and a large part of his body. Again we seer that this lens has some very pleasing bokeh and is a top performer in the image quality arena. It offers perfectly sharp results in as far as I can tell zero instances chromatic aberrations (CA). There isn’t even any CA in the region on its head where the sun is brightest which is excellent considering the situation. In my opinion the Mamiya 300mm f/4.5 APO is one of the best AF lenses for the MamiyaLeaf / PhaseOne 645DF platform.

image of an adorable white faced monkey taken in Costa Rica's Gaunacaste national park with the PhaseOne IQ180, PhaseOne 645DF, and Mamiya 300mm f/4.5 APO lens

Mamiya 300mm f/4.5 APO @ 1/400 – f/4.5 – ISO 200

First, lets just take a moment to appreciate how adorable this little guy is, runny nose, pensive look, and penetrating eyes. It was very difficult to decide which image to upload and write about because of their overwhelming cuteness, while I chose my absolute favorite of the series, fret not I uploaded the rest to my Flickr for your viewing pleasure. This image is a minor crop of the original which was shot with the Mamiya
300mm f/4.5 APO lens handheld. At decent shutter speeds, because of the relatively light weight nature of this lens, it is very possible to hand hold this lens. It is not possible to shoot this lens with a monopod when you have the V-grip air attached to the camera. Of course you could screw the monopod into the larger sized hole on the bottom of the V-Grip Air, however in the moment I did not have time to either think of this or preform this modification of my set up. Though, as we see it was in no way an issue in this well lit situation. The Mamiya 300mm f/4.5 APO preforms splendidly and renders the white-faced monkey’s face perfectly and provides pleasing out of focus bokeh, again showing how absolutely wonderful this lens is. And I mean come on, look at that face, zoom in on that runny nose, look at that little hand, with those little fingers, how do you not just love this mini humanoid?

Okay now we can get to what you are REALLY interested in the Mamiya 500mm f/4.5 APO. Again, let me clarify this is not my formal review of the Mamiya 500mm f/4.5 APO lens, this is simply a report on field use. Anyway moving on,

Image taken with the Mamiya 500mm f/4.5 APO lens with the Mamiya M645 2x N teleconverter of a bird in Costa Rica

Mamiya 500mm f/4.5 APO lens with Mamiya M645 2x N Teleconverter @ 1/160 – ISO 100

We will now start, somewhat inauspiciously with the Mamiya 500mm f/4.5 APO lens at the beginning of my trip. When beginning with this lens (or really any telephoto lens IMHO) I seem to have over estimated its capabilities for “reach” as it were and was somewhat to ambitious which meant that I was, shooting from distances too far from a subject and expecting a crop from my 80mp sensor to yield a tolerable image, getting to close and not having extension tubes, misjudging how easy it was to manual focus this lens wide open and so on (its not easy). Though these are all common things when beginning with a lens, I found it to be more the case since  it was the longest lens I had shot with for any extended period of time on any system (at that time) and on top of getting used to something this telephoto, I was also having to deal with stability and focus issues which arise from using a lens like this on a MFDB. Eventually I got the hang of it and was able to use it with a degree of success, just like the Mamiya 300mm f/2.8 APO. The 2X TC helped me realize some of my more creative ambitions, and the extension tubes helped me with some of the other limitations of this lens. This lens operates in an entirely different world then the Mamiya 300mm f/2.8 APO lens; this lens is longer and slower, which brings infinitely more challenges into the equation. With the 300mm, Mirror-up mode was not essential at reasonable shutter speeds, a monopod could be easily used, and teleconverters and extension tubes generally had focus confirmation even in reasonable light since they were below the f/5.6 focus confirmation threshold of the PhaseOne 645DF body. With the Mamiya 500mm f/4.5 APO (and everything I say goes double for the Mamiya 645 2x N TC), mirror up mode was almost always essential (except for in very bright light), a tripod with a Wimberely Gimbal head was essential, and though the teleconverter and extension tubes could be used just as effectively without degrading image quality, focus confirmation was generally out the window except for in the brightest lighting conditions. The image above shows a early, successful execution of stability and focus though, my composition was too aggressive, since “ya know” there was stuff in-front of the bird.

Image taken with the Mamiya 500mm f/4.5 APO lens in Costa Rica of a Turquoise-browed Motmot with my PhaseOne IQ180

Mamiya 500mm f/4.5 APO lens @ 1/200 – ISO 100

This next image of a Turquoise-browed Motmot (which is apparently somewhat rare) shows some of the good and the bad. This image was made with the Mamiya 500mm f/4.5 APO lens on its own. The image was taken on the tripod with gimbal head. It was taken at damn near close to the Mamiya 500mm f/4.5 APO’s minimum close focus distance. On the plus side, this image has decent stability and was probably taken at a moderately wide aperture if not wide open. 1/200 of a second is enough to let the image be generally stable without having to lock down the lens in the gimbal head, use mirror-up, or a table release and so on. However, because we are at close focus, with a fairly wide-aperture telephoto lens, as we can see the focus is perfect on the tail of the bird, while the body of the bird begins to be slightly out of focus. This is a shame since its a very pretty bird. Though at-least I have an image of it where its most interesting feature is highlighted and it is tolerably executed. It shows again, the issues of shallow-DoF with these Mamiya telephoto lenses combined with their fast apertures and large digital sensors on focusing which can lead to some issues.

Mamiya 500mm f/4.5 APO lens in Costa Rica on PhaseOne IQ180 taking pictures of a rare three-toed sloth

Images showing my support system, and shooting technique with the Mamiya 500mm f/4.5 APO and Mamiya M645 2x N TC on my PhaseOne IQ180

The next couple of images you will see will show the Mamiya 500mm f/4.5 APO lens at both 500mm and 1000mm and I think its important to take a moment and look at the shooting technique required with this lens. Here we are taking pictures of a three-toed sloth up in a tree. The left hand image is included to provide some idea of how far away the subject is from the lens. The Left hand image depicts proper medium format digital long lens shooting technique in its entirety. Luckily the subject for this particular image wasn’t really a fast mover so I could get everything locked down and make a good image. As we see, the tripod is completely locked down with the lens in place, the camera is in mirror-up mode and the cable release is attached to reduce vibrations when releasing the shutter. This is a more practical mode of shooting then using the mirror-up mode with the camera’s self timer since at least with the cable release, I can take the picture exactly when I want to while observing changes in the scene within the area I know comprises the frame I gave composed.

Image of a three-toed sloth in Costa Rica with the Mamiya 500mm f/4.5 APO lens on my PhaseOne IQ180

Mamiya 500mm f/4.5 APO @ 1/320 – ISO 100

Image of a three-toed sloth in Costa Rica with the Mamiya 500mm f/4.5 APO lens on my PhaseOne IQ180 at 1000mm

Mamiya 500mm f/4.5 APO with Mamiya M645 2x N TC @ 1000mm – 1/160 – ISO 100

These next two images allow us to show a direct comparison between between the 500mm and 1000mm focal lengths which can be achieved with the Mamiya 500mm f/4.5 APO lens. These images of the three-toed sloth were taken (with the above set up) and show off the image quality of this lens with and without the teleconverter. As we can see the image without the teleconverter which is of course, at 500mm is absolutely perfect even though the scene is somewhat challenging and backlit. The next image at 1000mm, shows some slight uncorrected chromatic aberrations in the lower left hand corner of the image where more or less blown out highlights meet the edge of the leaves. This is something which could have been expected from just about any lens when under these conditions with a teleconverter. Though not corrected here, I believe that with the latest update of CaptureOne 7 (CaptureOne 7.1.4) we will be able to correct the CA from this lens since as was announced there is now “Lens Support” for the Mamiya 200mm f/2.8 APO, Mamiya 300mm f/2.8 APO, and Mamiya 500mm f/4.5 APO lenses inside of CaptureOne.

Image taken with the Mamiya 500mm f/4.5 APO lens with the Mamiya M645 2x N TC Teleconverter and PhaseOne IQ180 of a Tucan in Costa Rica

Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/160 / ISO 100

Now we come to one of my absolute favorite images from the trip. Of course, as we can see this is an image of a Toucan, and Toucan’s are just pretty awesome on their own. This image was made with the Mamiya 500mm f/4.5 APO lens and the Mamiya M645 2x N TC, it was probably shot open, if not slightly stopped down.  The light coming in from behind the Toucan was relatively strong even though the grey clouds out that day, consequently I was shooting at a tolerably fast shutter speed and was able to stop down to allow myself some room to focus. Unfortunately, this meant slightly less then pleasing bokeh in the technical sense, however I like it for this particular image since the light coming through the trees in the background makes for an interesting pattern and the Toucan itself is still relatively isolated. The image was taken with the full procedure, mirror-up, cable release, locked down tripod and all. What this image does not show however is the place I was forced to stand to take this image. While compositing this image and waiting for the Toucan to get into the correct positioning etc, I unknowingly wound up standing on top of nest of some fire-ants who were none too pleased to have my foot enter their mound. Thankfully, I was wearing my rather high white tennis socks (a wonderful look with navy shorts, sneakers, and a a long-sleeve teeshirt btw) and my father who accompanied me was close at hand knock them off of my leg while I got the images. I think it was worth it, even though this final image was a crop, and because of the post-processing noise is apparent, it should still make a good print, though I plan to spend a good amount of time before printing it working on recovering some of the black of its chest.

Image taken of a Great Blue Heron in Guanacaste National Park, Costa Rica with the Mamiya 500mm f/4.5 APO lens with Mamiya M645 2X N TC Teleconverter and PhaseOne IQ180

Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/800 – ISO 200

Our next few images will come from Guanacaste National Park in Costa Rica and picture the movements of a cooperative Great Blue Heron. Here we see the Great Blue Heron wading out precariously close a crocodile  lurking in the foreground. The image was taken in fairly bright sunlight and was made using the Mamiya 500m f/4.5 APO lens with the Mamiya M645 2x N TC, however because of the extremely bright conditions, even stopped down somewhat an exceedingly fast stutter speed was being used and while the lens was mounted on the tripod, it was not locked down before every shot, and nothing bad happened to the resulting images. Some CA is visible on the rocks on the shoreline, but again this is only shown for purposes of this article, and especially in this example the CA is easily correctable within CaptureOne.

Image taken with the Mamiya 500mm f/4.5 APO lens and Mamiya M645 2x N TC Teleconverter in Guanacaste National Park Costa Rica of a Great Blue Heron

Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/1000 – ISO 200

As we can see, critical focus was completely achieved in this image which was shot in the way described above and was taken after the Great Blue Heron had advanced further out into the waters and we had moved somewhat closer. The image, which shows the crane cleaning or scratching itself in the water displays one of those classic posses of the Heron. One thing you might nor realize about the Heron however is that this creatures head and feet are extremely skinny. Now, you might assume that stopped down it would be easy to get the narrow head and feet into the plane of focus…and you would be wrong. Considering the DoF produced by the Mamiya 500mm f/4.5 APO lens @ 1000mm with the Mamiya M645 2x N Teleconverter and the PhaseOne IQ180′s sensor size we are still (even when stopped down) left with a relatively narrow focus plane to work with.

Image taken with the Mamiya 500mm f/4.5 APO lens and Mamiya M645 2x N TC Teleconverter of a Great Blue Heron eating a fish in Guanacaste National Park in Costa Rica with the PhaseOne IQ180

Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/640- ISO 200

To round out this set of images we will finish with a fun little image of the Great Blue Heron eating a little fish. In this picture we see the fish right after it was caught by the Great Blue Heron. Even though this image is 50% the size of the original we can still zoom in and see the detail in the expression on the fishes face after it has been plucked from the water and is about to be consumed by the Great Blue Heron. It provides us with a reminder of both the resolving power of this lens and the detail which can be produced by the PhaseOne IQ180′s 80mp sensor. Though stopped down, the background in this image is less obtrusive the in some other images even though it is not exceedingly out of focus.

Image of a Great Egret taken with the Mamiya 500mm f/4.5 APO lens at 1000mm with the Mamiya M645 2x N TC Teleconverter in Costa Rica with the PhaseOne 645DF and PhaseOne IQ180

Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/400 – ISO 50

Our next two images were taken at an abandoned aquaculture Tilapia farm in Costa Rica. Some of the pools are still filled with water and have developed a small eco-system around them including fish, insects, and birds which made for some very interesting sightings. Other then this egret there were many, many ducks, some small fowl, as well as a hawk (or eagle type thing), and a few of this Great Egret. This image is a fairly significant crop (see below) however it holds up excellently thanks to the very low-noise ISO 50 and the superbly sharp rendering of the Mamiya 500mm f/4.5 APO lens even when paired with the Mamiya M645 2x N. As we have seen multiple times in this article, when you achieve critical focus (no small feat), and use the proper long-lens technique and camera settings you can achieve some great results. Again we see he background, which is tolerably blown out, however because of a fairly significant distance between the camera and subject, we do not have a significant level of subject isolation thanks the bokeh but the sharp focus helps to bring the subject out of the partially distracting background, which can be a great quality of this lens in certain situations.

Screenshot of an image of a Great Egret taken with the Mamiya 500mm f/4.5 APO and Mamiya M645 2x N

As we can see the image is a very aggressive crop and it is a wonder it came out as well as it did. One of the unfortunate psychological effects of using this lens along with the PhaseOne IQ180 for me was a certain level of non-sechalnce about composition and framing assuming that I could crop in post to give myself “super-human” reach with this 500mm and 1000mm combo. Though it is possible, its much better to not get into this frame of mind and frame your images and take advantage of your sensor’s full resolution (DUH, but not apparent in the heat of the moment).

Image of a Great Egret taken with the Mamiya 500mm f/4.5 APO lens at 1000mm with the Mamiya M645 2x N TC Teleconverter in Costa Rica with the PhaseOne 645DF and PhaseOne IQ180

Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/250 – ISO 50

This next image was taken in the same lighting of the same Great Egret when it came to the ground. For this image, also at 1000mm, we have the lens stopped down at least a stop (judging from the shutter-speed while the ISO is held constant) and we can see the background has degraded significantly. This image is a similar crop to the pervious image. However, here even though there is decent if not perfect focus, the background doesn’t help things. The dried grasses that are in focus and out of focus blend together and the far out background is not any better and as we see this image is much weaker for it. It’s important to show the lens in different settings to see when it can be used effectively and when it is not advisable to apply the lens.

Mamiya 500mm f/4.5 APO lens review Iguana Guanacaste National Park Costa Rica

Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/320 – ISO 50

Here we can appreciate the Mamiya 500mm f/4.5 APO lens near its close focus distance and we can appreciate both how sharp and how nicely it can isolate a subject when it is wide open. We can see that a large amount of the Iguana is rendered nicely in focus, and in this close-to full resolution image (i.e no crop) we can appreciate the beauty and smoothness of a nice ISO 50 shot out of the PhaseOne IQ180 which really lets this lens show off its stuff.


Mamiya 500mm f/4.5 APO – 1/640 ISO 100

In another un-cropped image we see the Mamiya 500mm f/4.5 APO lens on it’s own without the 2x TC at a relatively close distance again and it continues to perform excellently to capture this silly iguana licking his chops. When we look at the Mamiya 500mm f/4.5 APO in my formal review we will of course consider the differences between 300mm and 500mm and what changes between these these two focal lengths. I can definitely say that these are two superior lenses, both with and without their teleconverter so we can truly not have to worry about image quality between the two lenses and can focus on their focal lengths and apertures to see which would be the ideal lens in certain situations. Being able to know you have two superior lenses to choose from makes it a lot easier as a photographer being able to select your tool based on its focal length and its abilities to render your subject is a wonderful feeling since we don’t have to consider “300mm vs 500mm which has better image quality?”.


Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/200 – ISO 200

For our penultimate image we will look at this crocodile lounging around on the banks of the river in Guanacaste National Park, Costa Rica. The light was exceedingly bright, and I wasn’t entirely aware of my ISO since I was so heavily involved in taking pictures so when this scene came up with very bright light I elected to stop down my lens in order to get a lot in focus which I could do since the camera was giving me a very fast shutter speed when shot wide open. I was curious what would happen when heavily stopping this lens, and as we will see from the final image (a crop) it does very well.


Mamiya 500mm f/4.5 APO with 2x Teleconverter @ 1000mm – 1/200 – ISO 200

This crop from the pervious image shows some very interesting characteristics. This image was taken at either f/11 or f/22 on the lens, so double that for the teleconverter and consider the total absence of diffraction and degradation of quality from the teleconverter. Its utterly remarkable (to me). I absolutely love how the animals teeth were rendered you almost have to wonder how it can be comfortable for him (her?) to have them like that because the way that they are seemingly sinking into its jaw is so vividly rendered. Absolutely stunning. And again even here at such a small aperture, when the lens is used correctly we can see decent isolation from the background (at least in the crop) which I believe is thanks to the insane sharpness of the lens.


Mamiya 500mm f/4.5 APO – 1/125 – ISO 200

Our last full-image to discuss comes more for its ecological intrigue then its photographic significance. This little White faced monkey was charged by his group as being the lookout while they at some fruit or nuts or berries or whatever monkeys eat. He however, through his own negligence failed to alert the group of our coming. The rest of the pack (group?) perceived us as a threat and in an interesting moment of social awareness decided that they would attempt to kill this poor little guy for slacking on the job, or at least give him a good scare. My wonderful guide, who I have had before and used multiple times on this trip, explained to us the social structure of these monkeys and how this was a very serious thing since it was imperative to the monkeys survival and we should imagine what would have happened if we were not friendly. Though this little monkey was not killed, we were told that usually they are given a good scare, however in serious cases they will either be banished by the group, or killed. On the photographic side of things, as we see here at 1/125th of a second without the tripod locked down completely if there is any movement it will be apparent.


Our subject from before hides by the bank of the river

Mamiya 500mm f/4.5 APO – 1/500 – ISO 200

And now, we come to the end of our trip and must conclude our time in Costa Rica with the Mamiya 300mm f/2.8 APO and Mamiya 500mm f/4.5 APO lenses. I learned a lot about both of these lenses and I hope my experiences educated you as well, dear reader.  Having had the Mamiya 300mm f/2.8 APO for some time now, I feel I was able to proficiently use it to execute some nice images with and without the Mamiya M645 2x N TC. On this trip however, I was able to begin to appreciate how powerful this lens can be when it is combined with the Mamiya Extension Tubes. This effect is even further seen when using the teleconverter and extension tubes in tandem which can yield some very interesting images. With its max. aperture of f/2.8 we can use TC’s and Ext. tubes together and still have a reasonable amount of light hitting the sensor which is most excellent. This being my first trip with the Mamiya 500mm f/4.5 APO lens (and in fact I had only received it about 3 weeks before the trip) I had to learn this lens, like you do with any lens. This lens is certainly unique, since it is on the longer side of medium-format telephoto lenses and requires different techniques and conceptual understandings of image making; which again I hope I have begun to unfold in this practically based article.


Montage of Mamiya Telephoto lenses, Mamiya 500mm f/4.5 APO, Mamiya 300mm f/2.8 APO - 

Mamiya M645 2x N TC, Mamiya Extension Tubes, and me staring off into the distance at birds

Thank you for your time, and please comment if you have questions, or well comments! Don’t forget to give me a like on Facebook and check out my Tumblr to keep up with all of my latest news on future articles and photographic adventures, and small executive summaries of articles. Also if your so inclined, you can check out many sets of sample images on my flickr page. You can also watch YouTube reviews and interviews on my channel and keep up with my latest coming and goings (photographically speaking) by following me on twitter if you are so inclined.

7 Responses to Field Report: Mamiya 300mm f/2.8 APO and Mamiya 500mm f/4.5 APO Lenses in Costa Rica

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