Originally posted by fast50 I'm looking at getting a Bigma 50-500, or maybe a Sigma 100-300 f4. guess what, the dealer doesn't have either in Pentax mount and says he probably can't get the 100-300.
My concern with these (as with my old 80-320 FA) is that the AF is s..l..o..w and noisy. Since the 50-500 gets very long, is it prone to slipping if held at a steep angle? I know there's a lock ring, but I never use those in practice.
Anyone with experience of either of these on a K10D?
thanks!
Hi fast50, I have the Bigma for my K10D and do not have any concerns about the speed of focus, or noise... it is no noisier than many other lenses, have no problems with bird shots even relatively close up. Of course your focusing is fast relative to the amount of light if you want to go auto or constant. Highly recommended.
Slipping? I do not notice it, usually have a firm grip and do not let it dangle by the strap or grip. I have the Bush Hawk shoulder grip, great to use.
This shot of a Rainbow Lorikeet a few days ago, was within 8 metres.. did not worry him, although he had a close eye on me.
Phil