In my opinion it is sharp in the center even at f/2.8 (but I am not an experienced lens tester). The only other 35mm I have used on the GXR is Voigtländer Nokton 1.4/35. My Jupiter is as sharp in the center as the Voigtländer, both are a bit blurry in the edges but I think the Voigtländer is a bit better there. I seldom I expect, need or want sharp edges when I use f/2.8, but for others I guess that might be different. It is a good, well built and inexpensive lens. I use it more and more.zmix":2w1nx2zt said:Thanks for the replies..! How does it look wide open @ f/2.8?
zmix":2958a546 said:I bought a second one...!!!