My apologies if this appears twice on the list. The original hasn't shown up yet, and subsequent posts by others have and are already in the archive.
================================== As I move gradually into the 21st century, autofocus lenses have become a serious consideration, and the FA lenses are especially interesting at this point. In trying a few different autofocus lenses it seems that some have a shorter focus throw than others, and some may have even been faster to focus than other lenses. For example, I used John Celio's 18~35 (or maybe it was an 18~55) and the focus throw seemed quite short and the lens seemed to focus faster than the 77mm Ltd. I say "seemed" because I didn't have the 77mm at the time in order to make a direct comparison. So, my questions to the list are these: * Are there any AF lenses (FA or otherwise) that definitely focus faster than other lenses? * Do lighter weight plastic-bodied lenses focus faster than the heavier-bodied metal lenses? * Would a shorter focus throw be an indicator of a faster focusing lens? * Are there any Pentax lenses, and maybe even third party lenses, that are noted for poor autofocus performance, which are they, and in what areas do they perform poorly? * In general, do the DA lenses focus faster or more accurately than FA lenses? * What's the best and the worst autofocus lens you've used (wrt focusing speed and accuracy)? * Which autofocus lenses do you prefer for manual focusing, and why? * Are there any things that can be done to improve focusing speed and accuracy with a given lens? Thanks for any help. Shel
