Can these lens be used on a Canon 450D/or 40D?

Question

Vivitar 28-70mm f/3.5-4.8

http://www.photodo.com/product_811.html

Tokina SZ-X 80 - 200mm

http://www.epinions.com/Tokina_SZ_X_80_200mm_f4_5_5_6_Lens/display_~full_specs

Answer 1

The Vivitar one doesn't come in an EOS mount, so you would need to get an adapter for that, and i think they its only manual focus. The tokina one didn't have enough info, but if it comes in a canon eos mount then your in the clear.