Obviously not. If the chip in the lens tells the camera it's an SDM
lens, then by GOD that's what we'll use to focus. It's simple minded
programing, lots of state checking tends to slow things down when
everything is working right. It doesn't surprise me that there is no
fall back to a "less advanced" auto focus mode, even if the camera has
been programed to notice the failure at all.
gldnbearz wrote:
I purchased a used DA 16-50 from B&H, rated at 9+. I put the lens on
my K200D and immediately realize that the lens won't auto focus. I
check the AF/MF switches on both the camera body & lens to make sure
that all was in the AF position (or rather, none was in the MF
position). I can manually focus the lens without problems. I have
also cleaned the SDM contacts on the lens, without any success.
Camera focuses fine with the DA 50-135 lens, so I doubt it is a
problem with the SDM on the body.
OTOH, when I place the lens on the *istDS, the lens will auto focus.
I'm guessing that the SDM component on the lens has failed. If that
is the case, will it not revert to the standard screw drive on a body
that has SDM ability?
Looks like I will be boxing this lens back up to send back to B&H.
What a poopy way to start the weekend. =(
- Pat
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