Hi! Thanks!
Jens, I think I knew about the hyper focal distance and Pentax manual lens markings... I just did not know it was called also the zone focus. Thanks for the formulas. I need to memorize them may be... Well, I've got now "The Negative" and I am going to read it very thoroughly... I suppose that zone focusing requires certain optical qualities of the lens to be present... Thanks again! Boris ([EMAIL PROTECTED] or [EMAIL PROTECTED])
