At Monday 10:42 AM 9/9/02 , you wrote: >Alan Bell schrieb: >> >> I occasionally see ads for lenses that say "small scratch on the front >> element but doesn't affect picture quality." Can someone discuss that >> proposition. It must affect picture quality to a degree, otherwise >> manufacturers sell them pre-scratched. :-) What is the effect of a >> scratch? If I'm really picky what will I see? >>
As far as I know scratches in the front lens not really influence the picture because they are so out of focus that they are invisible on the picture. A lot of small cratches, howewer, can cause image softening making the light more diffuse. It is said that one big scratch is better than several small. But I may be wrong, may consumer lenses not pre-scratched. Maybe the pro ones :). Zoltan * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
