Well, Kostas, I had a sigma lens once. It was sleazily constructed.
Although I do the best I can at sticking to OEM lenses for my Nikons,
the Tokinas are widely respected in the press. Popphoto's tests
usually show good sharpness and color response across the spectrum of
apertures and exposure times.
You might check on http://www.photo.net for reviews.
--
Emily L. Ferguson
mailto:elf@cape.com
508-563-6822
New England landscapes, wooden boats and races, press photography
http://www.vsu.cape.com/~elf
