Originally posted by dugrant153 Hey folks,
Hopefully this is in the right section!
I have an FA31 and an FA77 which I use as my go to lenses.
Now, one thing I've found is that the autofocus takes a bit more time on the FA31 and the FA77 than it does on, say, DA limited lenses. Most notably, the FA31 takes that extra zff zff before I get autofocus confirmation.... especially in low light.
I use a K10D (up for sale) and a K20D as my primary cameras and have considered the K7 and possibly the K-x. Since I shoot a lot of "low light indoor hardcore candle light only not your run of the mill everyday darkness with maybe a small LED or something" light... (cough), I was wondering if upgrading to a K-7 or K-x would solve this? Or is this just the nature of the FA31 lens - to have a bit more turns before it confirms?
I don't know if upgrading to K-7 will help.
I only have experience with K10D where I only can confirm your findings. 31ltd does take a bit to get things right but 99% of shots (providing your cam is focusing accurately with the lens) are spot on!
When I compared it to my DA40 I used to have, it's focus speed was much faster but got things wrong more often!
I suppose focusing throw may have something to do with it too...
anyway, if you are after really fast AF lens from Pentax, DA40, F50/1.7 and FA135 would be my personal recommendations!
Peter