I just got a EOS 350D recently, and I'm curious to learn a bit about M42 lenses or other mounts / manual lenses.
First is about AF, I noticed some lenses have "Auto" Labels on them, but I am thinking that if I use a adapter, the AF will no longer function, am I right about this? Also noted that there are AF confirmation adaptors, how do these work? They also look much longer, does this change the focal length of my lens?
Next, where can I buy these lenses? They seem pretty value for money to me. =) Is there any reason I should not buy them?
Thirdly, how do I exactly tell which mount are they if its not specified? And if I use 2 adaptors together, is a bad option?
Hope someone can teach me about these lenses or point me to a comprehensive website, thanks a lot!