I am about to order a Russian rangefinder FED-II with lens from a guy outside Moscow, Oleg Khalyavin, that fixes and sells such cameras. The question is what lens to choose. Besides Industar 61, he offers Jupiter 8 (50 f.2) and Jupiter 3 (50 f.1:5). Which one should I choose? Both are well within my budget, so price is immaterial. Both are also fast enough. I would just like to ask you which one is more likely to be a good, reliable and enjoyable lens?