On 1/04/07 2:40 AM, "Markus Maurer", <[EMAIL PROTECTED]> wrote:
> Why do some lenses go over infinity focus? What is that good for? IIRC, this is done to compensate for the thermal expansion/contraction. This is more profound in barrels made of aluminum such as Limiteds. Longer FL lenses must have this margin built in too, I suppose. I could be wrong but this what I remember. Ken -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
