----- Original Message ----- From: "J. C. O'Connell" Subject: RE: *ist D sensor and 35mm lens resolution
> There are no digital lenses that are the required > 50% sharper for digital that I know of. And besides > that, there are real world diffraction limits. One of the things that I think get's lost in htese sort of discussions it the "real world". The real world isnt a place of 1000:1 toc test targets, so why look at those numbers? The real world is a much lower contrast place, a place where the 1.6:1 chart is a better place to look. This is a realm where 60 lines/mm (Fuji Across 100) is very good indeed. I invite a look at: http://medfmt.8k.com/mf/lenslpm.html and look at the section: Calculating System Resolution where the fellow shows that system resolution is less lens dependent than we would care to think. system resolution = 1 (lpmm) ------------------------------------------- ( 1/lens lpmm) + (1/film lpmm)... Do the math. William Robb
