[ic-racer]

Nothing wrong with the J-8.

I like my Jupiter 8 also. The lens had to pass 31 lines/mm at the center and 14 at the edges to be certified by the factory. I presume these are 'wide open' values. The less expensive Industar seems to have better specs, but can't be tested at F2.0 because its a F3.5 lens.



Translated it says "Definition on film of 'KH-1'" then the columns on the bottom table show "lens tested," "Center," "Edge"

The first lens is the F3.5 Industar, which was required to get 38 lpm center and 20 lpm edge. The second lens listed is the F2.0 Jupiter-8 which was required to get 31 lpm center and 14 lpm edge to pass.