"Kotsinadelis, Peter (Peter)" <[EMAIL PROTECTED]> wrote/replied to:
> >From discussions the elements in the lens direct the majority of light >straight on as opposed to angled. >Film is flat but the pixels on a sensor stick out a small fraction (each >having a small encasement around it) so the light that comes at an >angle does not provide as much as if the light were directed a bit >straighter. Digital lenses designed for this compromise edge sharpness >(less light) in favor of central sharpness (more light directed to the >central area or smaller sensor) when used with film cameras. >My friend with the new Tamron was surprised and wound up buying the >Tamron 28-75mm lens XR Di and is selling the Nikkor. His colleague uses >a 10D and is also looking to buy this lens. Very impressive results. >When you enlarge the image you will see less artifacts with the Tamron >than the Nikkor and at a street price of $330 for a F2.8 lens designed >for digital, its a steal. (BTW, its surprisingly small too!) This effect is simply an interference pattern that show up when you have something with fine lines in it near the corners. Something like an air conditioning vent. It's a sort of moire pattern. It should not be noticeable on the 10d with a 28mm lens. I don't know about you but I don't shoot a lot of air conditioning vents and if I did I'd have to have a shift tilt lens anyway. Jim Davis Nature Photography http://www.kjsl.com/~jbdavis/ Reply in plain text only please! * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
