On 21 Nov 2005 at 6:47, Bob Shell wrote: > I saw no real difference in image quality between lenses made by > Cosina, Konica and Leica. For that matter, some of my Russian lenses > looked as good. > > With film the limiting factors in resolution are the size of the > silver halide crystals and the thickness of the emulsion. With > digital it is the size of the individual sensor elements, the > smallest of which are far larger than the crystals in any modern film. > > In digital the appearance of sharpness is created by the firmware/ > software used to process the image, not by lens resolution. I think > that lens contrast is far more important for digital than raw > resolution.
Hence the fact that the reviews I'm aware of don't tend to concentrate on image sharpness but on factors that do vary due to lens design like edge sharpness, CA and vignetting. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
