Jupiter 9 is a very good lens but why don't you buy a Jupiter 37A instead? Jupiter 37A is a "modified" version of Jupiter 9 and it is considered to be an overall better lens. It also has a rounded diaphragm (12 blades!) but it is a bit faster (f3.5 vs f4.0) and sharper. The images shot on a Jupiter 37A are just incredible! Surely, as most old Russian lenses (including the Jupiter 9), images shot on a 37A do have a little bit of initial blue cast. However, after a minor PP, the colors become very vibrant! Also, the images from the 37A do have a distinct "3D effect" and incredible clarity.
I have many * and Limited lenses but after a few days of using the 37A I was blown away by it! It's like a 135mm limited lens! It's very compact and built as a tank as well. Now I almost don't shoot with my FA*80-200 at all.
After a time I began to think that I want a similar lens but with a normal focusing length (I have a 43 Limited and *55 but they are different). The only alternative I found was a Zeiss Makro Planar 50/2 that costs much more
However, I bought it as well )
By the way, if anyone is interested, I have a very rare version of 37A for sale (in almost LN condition). It is an "MC-H-30" and it is considered to be the best of all other versions. At a time they were sold, it cost 120 roubles, an "MC" version cost 100 roubles and an ordinary version of 37A (without MC) cost 55 roubles.
Look for yourself how sharp a 37A is -
37?_PixelShift.jpg / ?????? Mail.Ru (pay attention at a flower bud at the upper right corner and also at a flower trunk at the lower left corner).