Raimo Korhonen wrote: > Interesting. Zeiss and Pentax 15 mm lenses were developed jointly.
There are still a couple of minor optical differences, I think. I remember seeing the optical diagrams. However I suspect that the Zeiss 15mm lens may be sharper at wide apertures because of more precise manufacturing rather than better optical design. Cheers, - Dave http://www.digistar.com/~dmann/
