Conclusion: The Zeiss Distagon T* 28mm f/2 ZF is a stellar performer on FX, however combined with the high resolution DX sensor of the Nikon D7000 it loses some of its sex appeal. The lens is still sharp straight from f/2 in the image center and it reaches excellent quality levels around f/5.6 here. The borders and corners however show quite a bit less sharpness at large apertures.
Excerpt: Originally posted 2008-11-14 on Optyczne.pl The one nagging question that’s always on the mind of a new lens kit DSLR camera owner is whether to purchase an additional and often more capable lens. Because the average kit lens is not always satisfying, buyers often quickly start searching for a newer, better and more expensive substitute. In my honest opinion, the new lens doesn’t always have to be a varifocal lens.