Originally posted by barondla I have Pentax 6x7 equipment. Don't use very often since it is difficult to get transparency film developed anywhere locally. Bought a K-1 6 months ago. Always wondered about a digital medium format.
1. Would it be worthwhile to buy a 645D (can't afford a Z)?
2. Shutter is rated for half the life of APS-C cameras. Can 645D still be repaired?
3. Do 6x7 lens perform well on 645? Is there some kind of "green button" gymnastics involved?
4. Are the FA lenses decent and are they and DFA interchangeable on 645D and 645Z?
4. Do you miss not having live view for critical focusing?
Sorry for all the questions.
Thanks,
barondla
Here's my thoughts:
1) Yes, the 645D is a great camera to buy however it all depends on your intended usage. I bought the 645D used in Summer 2017 and made about 20-30K of photos since that time photographing my family / 2 kids and while we travel. I had been using a Nikon D800E for years and since the 645D, that camera has been collecting dust except for certain low-light occasions or when I went that big 1.4 aperture look or when I shoot video. I sometimes miss the low-light capabilities of the D800E and the really high dynamic range where I can recover highlights better but I've started integrating a small fill-flash when I'm indoors to get past the 645D's CCD limitations. A 645D and cheap flash still is way less money than a used Z body. So I don't necessarily agree with the opinion that the camera is limited to the studio or in very controlled situations.
In bright light you can push the ISO and the noise grain is pleasing. In low light, yes, the D is weak compared to the modern sensors and I tend to not even push the D past 400 or 800. I simply know it can't handle it without a flash.
A year ago I had a chance to use both the 645D and the Fuji GFX50S side-by-side for about 3 weeks. I loved the live view of the GFX and the lack of shutterslap. I could get it down to 1/30th of a second shutter without blur. The 645D is hit or miss once I start going below 1/60th or 1/125th for longer focal length lenses. The Fuji really showed me what the modern medium format sensors could achieve. It has a better dynamic range and can recover those highlights better. I assume the 645Z is the exact same since they use the same sensor. That said, to get that extra performance from a Z versus the D, you need to spend $1000-2000 more for a used system which could easily be used to be some nice 2.8 lenses like the amazing 90mm.
2) I live in Hamburg Germany and there is a repair shop, Rüdiger Maerz, that quoted me about 700 EUR for a shutter replacement back in 2017. Not small, but not crazy high in my opinion to keep the D going. That said, a few months ago, I scored a good deal on another 645D body to use as a backup. It required the shutter to have more oil added to it. Despite the low shutter actuations on the body, the shutter was getting stuck from lack of oil. That cost 200 EUR to fix. Even with the repair, the second 645D was still a steal. I figure as time goes, a good used body will be harder to find. So far it seems more Ds and Zs are being sold as people switch the Fuji System or a more recent full frame system.
5) I do miss liveview in certain instances but for my usage, taking photos of my kids, liveview wouldn't help me much. For landscape or studio shoots with controlled subjects, I'm sure liveview would be critical to have. I don't do studio work and for landscapes shots, I don't focus stack so the 645D's autofocus system works perfectly fine for me. I can take a photo and of course review it to see that its not off. So far, with all of the lens that I use 35 / 55 / 75 / 90 / 150 / 80-160, they all hit infinity focus nicely so I trust in its autofocus without thinking I need to zoom in afterwards.