" Do you have the 35mm back? My setup came with one and also a homebrewed Polaroid back."
Yes I have a 35mm Makina Back, I've never played with it (yet). The NexC3 Digital Back is about the same size as the 35mm back, and I use that in leiu of expensive Fujiroid Instant testing. Quite liberating actually
SONY DSC by
Nokton48, on Flickr
On the left back, a Plaubel Makina 35mm Roll Film Back (miniature size) on a Makiflex MX/525 Adapter Back. So 35mm film on the Peco Junior or my Makiflexes. On the right back, Sony 16mp Nex3 E camera body attached to another PJ 120x120mm lens board. As you can see the E chip is about 35mm size or so. The advantage of this new digital back is that is weighs practically nothing, and is about the size of my Makina Film Backs, with a lot less weight. Finally in the front left is a Canon Digital rear lens mount, ready to be bolted to another Plaubel 120x120 lens board. With a very short extension tube, the Canon 50D digital camera will clear the back, due to the bulging grip on the front of the camera. All this is quite usuable for photography especially digital testing of lenses and such. And of course the idea can be upscaled with an old Hasselblad or Phase 1 etc for medium format digital photography on the cheap. With the Makiflexes, I have to open the focal plane shutter at the "B" setting, then compose and shoot with the digital backs. Useful for testing and reads out correct exposures in the digital camera. So a quick and easy switch to 35mm or medium format/sheet film and digital back and forth easily.
Same digital back also fits my Makiflexes.
SONY DSC by
Nokton48, on Flickr
SONY DSC by
Nokton48, on Flickr
Digital Test photo from above Automatic Makiflex Body as seen above. Shot with 150mm Makiflex Auto iris Symmar