Jupiter 11 and Infinity

[martinsmith99]

I have the J-8 and the Industar 26M which have no problems with infinity focus, but when I attach the J-11, then according to the RF patch, it's not reaching infinity.

As the 2 50s don't have this problem, is it likely to be the fault in the lens?

 

[wolves3012]

It depends how far out it is. I often find that different lenses make a small difference to the RF, infinity being a small fraction out. If it's more than that then the lens could be at fault. You could try adjusting the RF for the J-11 and then see how much difference it makes with the 50s. You could also try shooting a few frames from a roll using the J-11 and find out if it's really out - it may work fine.

 

[martinsmith99]

I've tried shooting at infinity to see if it is out. I'll see what happens when I develop the film.