Kiev, Kiev-2 and Kiev-4 have Contax rangefinder mount and lenses mount on them and focus without any issue. There was one wide angle lens for Contax which doesn't fit Kiev because it's got a long rear element and it just happened so that while copying, Kiev engineers made camera shutter thicker than Contax. But unfortunately I can't recall which lens was it. Original "Kiev" without a light meter box is fairly compact, its "Jupiter-8" lens is collapsible, so also very compact. The lens is a copy of Zeiss Sonnar 50 mm f/2 and yields nice results.So I can use soviet lenses (which I hear are well) but which bodies are good to use? I'm interested in trying out Helios and Jupiter lenses, I don't know about which mount, but I prefer a compact design. Can you recommend a good body which I can attach using maybe contax, leica, or m42 mount which are compact?
Zorki and Fed cameras have M39 rangefinder mount.Both brands are compact, except for Fed-4 and Fed-5. Good lenses for these include:
Industar 50-2. It's a copy of Zeiss Tessar, 50 mm f/3.5. "50-2" in name suggest that it's a "model 2" of "Industar-50" so not to be confused with 50 mm f/2.
Industar 26M. It's also a copy of Zeiss Tessar, this time 50 mm f/2.8.
Jupiter-11. This is a telephoto lens so not so compact. Zeiss Sonnar 135 mm f/4 copy. Sharp and nice. It even has the coating (yay!)
Now, I can't think of a single compact M42 body. All newer Zenits (B, E, ET, 11, TTL, 12, 122) are big and all older Zenits (3, M and S) are, well, old. This photo taken from the Internet demonstrates it very well:
https://i.ytimg.com/vi/CIAARMqZob0/maxresdefault.jpg
Unfortunately I'm at work right now and I can't give a better size comparison.
As for the lenses, there are M42 version of Industar-50-2 available and it's a good performer, sharp and contrasty, even with poor quality control of Soviets.
Helios-44 is most common Zenit lens.. A copy of Zeiss Biotar, of course. Helios-44-2 has a manual aperture, while 44-M has automatic with Zenit cameras and is considered a better model.
Industar-61Z which is similar to Industar-26 is also available. "61Z" is the one that fits SLR cameras, regular 61 was for rangefinders.
There is also Zenitar-M which is 50 mm f/1.7 but it's less common than Helios.
The only compact lens from the ones I have mentioned is Industar-50-2. All Helioses are made of metal and glass, are heavy and large. Unfortunately, there is no Helios for rangefinder cameras, so if you are looking for a compact body, you might as well go for Pentax Spotmatic. After all, M42 is M42.
Quality control was poor in USSR, so even two lenses from same factory made in same year (first two digits of serial number usually represent a manufacturing year) can perform differently from one another. Here's a good article about factory logos. Krasnogorsk is the one you might wan to aim for, it had best overall quality, although Arsenal is the one responsible for making Kievs.
http://cameras.alfredklomp.com/logos/
Here's a nice guyde