On Dec 15, 2009, at 3:59 PM, Mark Roberts wrote:
On 12/15/09 4:29 PM, Carlos R wrote:
you must be sure you
disengage AF by using both the camera AF/MF switch and also by
pushing
the focusing ring on the lens towards the camera body, as,
unfortunately, these Sigma lenses can't deactivate the AF motor in
the
camera body only by using the lens clutch, like genuine Pentax FA*
lenses do (FA* 24 mm. 2.0, FA* 300 mm. 4.5, FA* 80-200 mm. 2.8 and
some
others).
I'll second that. Both the Sigma EX lenses I've owned worked this
way: You need to switch off AF on the camera body and pull the lens
focus ring toward you. Works very well then. Not as convenient as
the Pentax FA* lenses, but then again, they're about half the price
of equivalent Pentax FA* glass :)
I've got no problems with the functionality. It seemed odd,
especially since the AF/M ring on my bigma disengages the drive gear.
It's just got a horribly lumpy feel in manual focus. They said it'll
take 3-4 weeks for them to repair it, so I'll send it in after the
holidays. I've got too much need of it right now.
--
Larry Colen l...@red4est.com sent from i4est
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