The Perfect Lens

by Howard Grill I have written before about issues regarding 'good' and 'bad' copies of the same lens, mostly by referencing some of Roger Cicala's great articles.  Well, Roger has done it again.....demonstrating the wide variety in lens test results from different copies of the same lens and also showing that for the most part, when it comes to making photographs and not pixel peeping, the variations make very little difference.  These variations will never be eliminated unless a company wants to sell single lenses for a small fortune each.  There are however, some grossly faulty copies that occasionally sneak through and these should, in fact, be removed by quality control and do visibly effect the appearance of the photo.

The article makes for an interesting read and can be found here: "There Is No Such Thing As a Perfect Lens".