Bob Talbot wrote: It's interesting: the full-frame Canon Digital performs bleeding well yet the smaller frame ones have edge-problems? Someone please explain that.
I always thought the "digital" tag on lenses was a warning to people with pro-cameras that they had a smaller image circle and would need upgrading within 12 months ;o) ------------------------------------------------------------------------------------- >From the Olympus site I think this does fairly well at explaining it: "...lens systems are generally designed to be able to deliver a particular maximum resolving power, measured by how tightly they can focus a hypothetical point source of light. Most film-camera lenses are designed with the resolution limits of film in mind (no surprise), which apparently results in "circles of confusion" (sounds like a planning meeting at The Imaging Resource ;) or "blur spot" size of 6 microns or more. The problem with applying such lenses to digital imaging is that the lens ends up being the limiting element in the overall optical path. Olympus' contention is that lenses need to be designed to match the requirements of the new medium. We don't have any way of verifying the impact of all this optical technology, but can say that the lens on our E-10 evaluation sample looked exceptionally sharp. " So it could be extrapolated that full frame sensors would benefit from lenses that were originally designed for the same size film area. Smaller digital sensors lose out. Peter K * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
