I recently stumbled upon some photographers on Flickr that all use an old medium format digital back and I was blown away by their photos. It’s the Kodak DCS 645 Pro Back, a digital back released in 2002 (20 years!!!), the price when it was released was $12,000, so not just a average camera but something very special. What caught my attention was the colors of the sensor, it almost looks like Kodak Ektar or Kodachrome, but this is not film it’s digital. Especially for daylight photos I’m burned out on digital cameras, the photos look boring and I often end up trying analog film as an alternative, just to get disappointed and returning to digital again. So if this can give you amazing colors on digital, this is really worth trying.

Kodak DCS 645 Pro Back

Here are some of the specs for this old digital back:

  • 16 megapixel CCD Sensor
  • Sensor size is 36x36mm (square). So it’s not really medium format but more a taller full frame. But pixel wise it’s not far from the Fujifilm GFX.
  • Iso 100-400, but iso 200 and iso 400 is just iso 100 pulled up post processing.
  • Supports DCP raw files.
  • Writes to CF-cards, officially Kodak only supports very old small cards but never cards don’t seem to be a problem (just format them with in the cameras menu before use).
  • Dynamic range is unknown but I’m guessing 10 stops. Highlight recovery is very good, shadows has nasty colored noise when pulled too much.
  • Supported camera options: Mamiya 645 AF/AFD or Phase One. Hasselblad H1 / H2. Contax 645. Mamiya RZ67. Hasselblad 555ELD (old school Hassy).
Phase One DF

Mamiya 645 / Phase One

As camera for my digital back I picked Mamiya / Phase One. I used Mamiya 645 in the past and think it’s the most underrated medium format system, the lenses are very high quality and even the old ones produced in the 70s can beat modern lenses in some cases. I also like that Mamiya/Phase One has 1/4000 shutter speed for shooting wide open. Phase One bought Mamiya at some point but still support the old Mamiya camera standart up to their Phase One DF or DF+ (but you have to update the firmware of the digital back to use Phase One cameras, scroll down for firmware info).

Kodak DCS 645 Pro Back are hard to find, it was a rare product back then and is even rarer today. The Mamiya version (the Kodak DCS 645M Pro Back) seems to be the most sought after and almost never appears on Ebay. On the other hand there are many one available i.e. the Hasselblad H1 / H2 (the Kodak DCS 645H Pro Back) so maybe consider that one. I would love to try the Contax version with that Zeiss 80mm f2.0 but that camera has become so ridiculously expensive.

Phase One DF + Kodak Professional DCS 645 Pro Back

For Mamiya / Phase One you have 4 lens options:

  • Old manual focus Mamiya 645 lenses. Very high quality lenses made from the mid 70’s to 90’s and often very cheap (for medium format).
  • Mamiya AF 645 – often the same lens designs as the older Mamiya 645 lenses but with auto focus, produced in the 90s to 00’s. Compared to the manual focus ones they are made in plastic not in metal, but I don’t mind.
  • Schneider-Kreuznach / Mamiya D lenses – produced in the 00’s, more modern lens designs than the older Mamiya AF lenses. Very good lenses, a bit more expensive than Mamiya AF lenses, but for some of the more common ones (like the 80mm) price difference is not that big.
  • Schneider-Kreuznach blue ring lenses – this is the current lens line for Phase One. Is designed for the 100 megapixels + Phase One backs, very expensive, probably not worth it for this old digital back.

I got a Phase One DF and a Schneider-Kreuznach 80mm f2.8 pretty cheap on MPB and and later picked up two Mamiya AF lenses (45mm f2.8 and 210mm f4).

Danish summer house at Sjællands Odde – shot using Mamiya Sekor AF 80mm f2.8

My experience

It was a big experience when I first got the camera. The images I got from the camera was very good but I also had a lot of technical problems.

The image quality from this camera is very good. It gives a very clean look together with the amazing Kodak colors. Compared to Fujifilm’s digital cameras, the Kodak colors are more film like, more organic. It’s a bit like film where you sometimes take a photo and magical happens that you don’t expect from a digital sensor. The photos also has a bit of retro feel to it, so I mostly used the camera for more retro or kitch subjects.

Another pro is the sharpness, the Mamiya / Schneider lenses are very good, a more sharp look (or maybe it’s the pop it has?) than I have had from any APS-C or full frame camera. If you also has experience with digital medium format this might not wow you, but for me it did.

Forrest area in Sjællands Odde –
shot using Schneider-Kreuznach 80mm F2.8 LS

The interface on the Kodak DCS 645 Pro Back is very primitive, and almost makes it feel like an analog film back. There is a color screen, a few buttons, you can enter a menu, change settings etc. You can even view the photos you have shoot, but don’t expect getting anything out of that, the screen is so small and the colors are totally of. I never used the screen for anything else than changing settings initially. It’s both good and bad. I wish there was a way of seeing you photos on the go. On the other hand it gives you that same feeling as when you shoot analog film, you have to focus on your skills and hope you capture the photo, making the hole experience a bit more exciting.

Like I mentioned in the beginning, my problem with digital cameras in general is that daylight photos looks boring. That’s also why I lately have been shooting at lot of night photos and I almost gave up on daylight photos. But this camera gave me the passion back, I brought it every where in daytime even though it is a very big camera. For this alone it’s worth all the money it cost me. And just to make sure, by daylight I mean in daytime but not golden hour or blue hour, a time of day where it’s normally hard to get photos to look interesting. Kodak DCS 645 Pro Back do well in daytime but of cause if the light is bad, it’s still bad with this camera. I have shot a lot of nice photos in direct sunlight with this camera, but I think it does even better in cloudy weather.

For nighttime and low light photos: of cause iso 100 is not low light friendly so you’ll need a tripod, but you can get some very nice results. There are some interesting effects with light sources that gets a halo around them (see photo below) that can be used creatively. The problem with nighttime photography is that the shadow recovery is poor compared to modern cameras, you get some very ugly noise in the shadows. I did have a bit of luck with shooting during blue hour (see photos below), but for now I will stick to my Fujifilm systems for night photography.

Night time photo from Valby Stadion, Denmark. Was shot a bit underexposed so pulling the shadows up gave a lot of noise. Shot with using Schneider-Kreuznach 80mm F2.8 LS
Car wash in Copenhagen – shot using Mamiya Sekor AF 80mm f2.8

Square format of the sensor is good for isolating subjects (person or objects), but not good for landscape / cityscape because you get too much foreground (and often foreground is just dirt or road) or sky. The 3:2 format (that you have on APS-C or full frame) is very good for cityscape / landscape. Sadly it doesn’t look like any 3:2 medium format cameras exists, only 1:1 or 4:3.

The Phase One DF that I ended up getting is a very good camera that I enjoyed using. It is very very big and heavy, but I still managed to bring it everywhere I went the last couple of months. People always mention that Phase One cameras are for studio use, not for outdoor, but it worked out ok for me. The Phase One DF has a lot of pro features that no other DSLR I owed had, i.e. when you setup a timer, you can pick how many seconds precisely, how many photos to shoot after the timer and how big interval between each photo. There is also the Phase One DF+ with faster autofocus and ability to calibrate auto focus for each lens, I might consider that one day. The newer and very expensive Phase One XF don’t support the Kodak DCS 645 Pro Back.

Statue in Frederiksberg Kirkegård, Denmark – shot with using Schneider-Kreuznach 80mm F2.8 LS

I made a test of the lenses I got, the Mamiya AF 80mm f2.8 [test photo here @f2.8] vs. Schneider-Kreuznach 80mm f2.8 LS [test photo here @f2.8]. The Mamiya is cheaper, based on an older (but legendary) lens design. The Schneider-Kreuznach is newer, a bit more expensive but not much, and has leaf shutter in the lens (so good if you do flash photography). I tested both lenses. Shooting the lenses at f11 doesn’t show any difference. Shooting wide open at f2.8 they are also both very good, the Mamiya is a great lens, but the Schneider-Kreuznach a tiny bit better. Center sharpness is good on both (maybe a hair better on the Schneider but you have to really pixel peep), but the corners are a lot sharper with the Schneider. But do you really need sharp corners when shooting wide open? Schneider lenses might be worth it for more modern high resolution digital backs, for the old Kodak back it’s probably not worth the small extra sharpness boost. So for lenses I recommend getting the Mamiya 645 AF lenses

There is also the older manual focus Mamiya 645 lenses, like the famous Mamiya 80mm f1.9 lens. I have seen some people use that lens with the Kodak Pro Back with great results, but for me it’s very hard to nail focus. I ended up getting the Mamiya FD402 Viewfinder Magnifier, but still with that it was hard. I also tried the split focusing screen you can find on Ebay, but that was almost always not in focus. Not sure if it’s just me, but I would stay away from manual lenses.

Chinese Dragon Boat Festival in Copenhagen – Shot with using Schneider-Kreuznach 80mm F2.8 LS
Old Ford car – Shot with using Schneider-Kreuznach 80mm F2.8 LS

Common Technical Challenges

I had these problems when using Kodak DCS 645 Pro Back, here is how to get around them.

  • Battery drain is a problem, so I unplug the battery when not using the camera.
  • Long exposure shots take long time and might make the camera think the digital back stopped working. That is because after 1/4 sec (can be configured in settings) the camera takes another black photo to retract noise grain from the original photo, and because of the slow cpu on the digital back, it takes a lot of time (30 sec or so) and also drains batteries fast.
  • It’s hard to frame your shots, the Phase One DF viewfinder matches with top and bottom of your photos, but the viewfinder is not square so you won’t know where your photo left and right side is. Alexey Danilchenko made some custom framelines you can print on transparent plastic and put into your viewfinder, get them here. The Phase One P20 has the same sensor, so I ended up ordering a viewfinder mask from here.
  • There is an internal clock battery – it’s Panasonic VL-2020 rechargeable battery, that recharges when the camera is powered on, but the charging is very slow.
  • Some Phase One DF’s has a firmware version that doesn’t support the Kodak 645 Pro Back. You can update the firmware with a Phase One digital back, or a cheaper solution is to get the Phase One V-Grip Air. Plug in the usb cable into the grip while connected to the camera. Run the Phase One firmware updater, drag n’ drop the firmware file on to the program, and flash it. Phase One DF+ don’t have the same problem (as far as I know) but I’m gonna share the newest firmware for that camera here also. Files have been removed from Phase One’s servers, so I will share them here on my site:
    » Download Phase One Firmware Updater for Windows – Firmware Updater.Win.
    » Download Phase One DF 1.58 Firmware – 645df_family_0158.fwr
    » Download Phase One DF+ 2.31 Firmware – 645DF+_Family_0231.fwr
  • After writing this post I found out that there seem to be different IR filters, I bought another Kodak 645 Pro Back and it came with an IR filter that gave very different colors. One filter gave me very blue colors and one gave me very yellow orange colors (and not something to just adjust in the raw files). I cannot see any different on the filter so not sure what’s up with that.
  • The back LCD panel will get more and more dim over time until you will not be able to see it. Alexey has also made a solution for this problem, which is to install a new backlight led light behind the LCD, check this Github for more info. My Kodak Pro Back’ displays are still ok, but I will also try to make the installation soon.
  • Glitches or static noise photos (like the ones below): The problems is related to the old CCD sensor. The sensor gets turned on when you half press the shutter and is only kept alive for X sec. (configured in the menu -> “Soft Press CCD Active Time”). If you pass that time and take the photo, the sensor will be full of garbage data and you get these kind of images. Look up the Soft Press CCD Active Time property on Alexey Danilchenko’s GitHub for more info.
Camera glitches, looks pretty cool actually


  • Custom firmware: the first thing you should do when you get a Kodak DCS 645 Pro Back is to upgrade the firmware. Alexey Danilchenko have managed to make a custom firmware with a lot of new features and settings. This firmware i.e. enables you to use Phase One cameras not only Mamiya. Big thanks to Alexey Danilchenko for all his work. Get the firmware from his Github.
  • Color Profile Extraction Tool: cameras often have related color profiles when you open them in Lightroom or Camera Raw. Kodak made color profiles that are embedded in the raw files, but they need to be converted to a Adobe friendly format. Alexey Danilchenko made a tool that can extract this, check out his Github.
  • Raw Photo Processor: Some people in old forum posts claim that this Mac program was best at exporting the Kodak DCS 645 Pro Back raw files. Other people say that newer versions of Lightroom or Camera Raw are just as good. I haven’t tried since I don’t own a Mac, but maybe worth a try?
  • Phase One DF / DF+ firmware can be upgraded but only if you own the hand grip.
My son, at that time around 11 months old – shot with using Schneider-Kreuznach 80mm F2.8 LS

Sample Raw Files

I have made a zip file with all the photos from this blog posts raw files, download it here (192 mb).

Conclusion – The King of CCD Sensors

For me it was the best camera I have bought in years. I have been a bit stuck with my photography lately, modern cameras only make photos look good if you shoot in extremely good conditions, and only having to go out in very good photo conditions gets boring. This sensor can even make boring daytime photos look great, a bit like analog film. This camera really has some great colors and great pop to the images. It’s not a tool that can be used in any situation, and I would only recommend this camera to people that are at an expert level with photography. Biggest downsides to the camera it’s big size and the 1×1 square image format (is great for isolating subjects, not great for landscapes).

It’s amazing that such a good camera option existed for so many years, and it must have been very exiting to use this camera when it was first released. Fujifilm announced in 2003 that they where gonna release a digital medium format back, but the product was never released. Imagine how awesome owning a vintage Fujifilm digital back would have been today.

Big thanks to Alexey Danilchenko for creating the custom firmware and other helpful tools. Also big thanks to him for helping me getting up and running with the camera.

Are there other alternatives out there to the Kodak DCS 645 Pro Back? I have looked at photos from other old CCD digital backs, and none of them seem to have that interesting colors. I tried Mamiya ZD for a few days and that camera didn’t have good colors (got scammed on Ebay buying a broken Mamiya ZD and lost a lot of money). I also recently picked up a Fujifilm GFX 50S II, hoping it would also have some of that medium format magic, but it was just like a slightly better Fujifilm aps-c camera, a bit disappointing to be honest.

Wanted!!! If anybody has the Kodak Professional DCS Capture Studio (the Windows version, someone was recently kind to send me the Mac version), please write me!

Overgrown greenhouse –
shot using Mamiya Sekor AF 80mm f2.8
A typical danish summerhus – shot with using Schneider-Kreuznach 80mm F2.8 LS

Related Links

Update: More photos here added after review was made

I think the Kodak Professional DCS 645 Pro Back has a nice gold color. Here in Carlsberg Byen in Copenhagen, shot with using Schneider-Kreuznach 80mm F2.8 LS
Gas Station in Mellbystrand, Sweden – shot using Mamiya Sekor AF 80mm f2.8
Kiosk in Laholm, Sweden – shot using Mamiya Sekor AF 80mm f2.8
Houses with snow in Mellbystrand, Sweden - shot using Mamiya Sekor AF 80mm f2.8
Houses with snow in Mellbystrand, Sweden – shot using Mamiya Sekor AF 80mm f2.8
Interesting flare you can get with The Kodak Pro Back
Cool old car in Sweden, Ystad