The focus of Canon 200mm f1:1.8 seems to be entirely USM driven. Manually rotating the black ring has no impact at all on mine, as it is broken. What toolset would be the best I could buy (from ...
I have a Canon T3i (600d) and two lenses: EF-S 18-135mm and EF 50mm f/1.8. While working with manual focus, I can shoot out of focus (on purpose) with the 18-135 (as expected). But with the EF 50mm, ...
I have dilemma what camera is better Nikon D5100 or D90. The first one is newer but the second one has lens servo ("screwdriver") motor. My question is: can I save some money overall with the more ...