Quote:
Originally Posted by SunderlandPhotography
I was looking at the 17-40mm f/4 lens. Would it be ideal for my 450D body?
I've been comparing lenses with my 18-55mm HERE. What does it mean by it has a Full Time Manual Focus? |
Taken off Canons website:-
Many EF lenses are equipped with a ring-type USM which allows full-time manual focus in AF mode. This means you can manually fine-tune focusing as soon as auto focus is complete, without having to switch to manual focusing mode. Full-time manual focusing on most compatible lenses uses a mechanical system for instant responsiveness.
With regards to the 15-85mm it is a cracking lens, it does suffer from Vignetting at the wide end but that is easily corrected in PP.