I have used some of them Jupiter 12 35/2.8 on Epson RD1 and Leica M240 Jupiter 8 50/2 on Epson RD1 and Leica M240 Industar 62 50/2.8 on GXR M-module
Jupiter 12 This is such a wonderful lens! My version was three years older than me! (born in 1965) I enjoy this lens and it beats all my expectation. Color is nice, image is very solid and the rendition is very true. If you can accept the aperture wield adjustment method, this is a solid performance! I used it well on RD1 (Crop sensor like yours) and M240 all to great result. Try to shoot it at F4 onwards, F2.8 may be a little hard on this Russian friend. The only thing I don't like is the 1m minimum shooting distance, because it limit the magnification ratio of this lens. Other than that, perfect lens. The rear stick out too much so poor M9 user will miss this lens!
Jupiter 8 - this is rubbish! At least my copy is one. This lens can focus sharp at all. Even at F5.6 I am about to throw it away. If you compare this with Leica Summicron, it is about only 15% at best. Image quality is not solid. Don't waste your money.
Industar 62 - another good shinning star. I was amazed at how this little Russian can achive on my GXR! Especially at mid to near distance, portrait shots, this lens is superb! Good for people, not so good for scenes.
Obviously, all the above Russian friends hate direct light and you should try at best to avoid directing them toward the lights. Hope this helps. I read and communicate in Chinese but writing in English is just so much faster and easier. Let me know or PM me if you need any more opinion. Cheers.