However, it's also true that these defects are due more to a lack of final quality control and maintenance than to design (they copied the Hasselblad 1000F after all).
The Hasselblad 1000F wasn't a reliable camera as well. They abandoned the focal plane shutter and decided using a reliable leaf shutter was a better choice, and thus the 500C was born and the rest is history.
The soviet cameras (Salyut, Kiev 80/88) are inheriting the reliability problems of the 1000F.
That being said, there are people who report very good reliability with them. But they're not the norm.
The back's light tightness (or lack of it) could be due to the camera body or the back
Light fog problems in the back are almost always caused by a worn seal between the dark slide and the back. Something easy to repair.
Maybe also the experties of
@flavio81 can help with this thread
Thanks for the quote, however i'm not sure how to help.
What I see here is that you are trying to fit a digital back on a Kiev 88 or similar body.
This would mean that you would use a smaller sensor than 6x6 on a 6x6 camera.
Anyways, if you're doing that, the only advantage I see is to use the wide array of (VERY CHEAP) soviet lenses available for that mount.
But on the other hand I read here that you are planinng to mount large format camera lenses with leaf shutters. In that case, using a Kiev 88 doesn't make sense at all, just adapt a digital back to a large format camera and call it a day.
Finally, I never liked the idea of old medium format lenses on digital backs. The sensor size of what the industry has the
nerve to call "MEDIUM FORMAT DIGITAL" is tiny compared to true medium forma. I think the biggest sensor available nearly reaches 645 format. That is a joke.
If you want to digitally get closer to medium format results i would recommend Pentax 6x7 lenses on a Fuji GFX "medium" format digital using a Kipon focal reducer. In that way the laughably tiny sensor size of the Fuji is optically compensated for.
Still, i'm a film shooter first and foremost.