Bob Rapp writes: > I was surfing and looking at the Zeiss lenses for the Contax. Did you know > that both Pentax and Zeiss share the same optical formula?? I know which one > was first!!
I seem to recall that the two lenses are slightly different. Pentax used an aspherical element (see the optical diagram on Boz's site) and I am pretty sure that the Zeiss does not (they weren't easy to produce back then). Zeiss added a couple of extra elements while retaining the same basic design; I assume this was to compensate for removing the aspheric element. I am not sure if Pentax designed the lens then licensed it to Contax, or if they collaborated from the start. Either way its rather a nice lens despite its size and weight, provided you stop it down a little. I'll take the chance whinge again about the selection of built-in gel filters which leaves a bit to be desired for those who don't shoot B&W... Cheers, - Dave David A. Mann, B.E. (Elec) http://www.digistar.com/~dmann/ "Why is it that if an adult behaves like a child they lock him up, while children are allowed to run free on the streets?" -- Garfield - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
