That's pretty much how my 16-50 behaved when autofocusing to infinity
through the window. Haven't tried it outdoors. But my lens performs
beautifully for everything I do. I'll have to remember to check focus
with a manual twist if I shoot something at infinity, but that's a
rare case for me.
Paul
On Feb 12, 2009, at 1:00 PM, jtainter wrote:
Last night I tested the new lenses for focus adjustment. The DA*
50-135 benefited from a -1 adjustment. No big deal.
To my surprise, the DA* 16-50 needed no focus adjustment.
Today I took the DA* 16-50 outside again to see if it still has the
problem of not autofocusing to infinity at 16 mm. I first focused on
a distant building, and it focused to infinity. Pleasant surprise. I
then focused on some distant bare branches, and it displayed the
problem of focusing only to just beyond the 2 m. mark. I then
focused on a different set of branches and it focused to the far end
of the infinity mark.
I'll try to find time soon to give both lenses a brick wall test to
make sure there is no decentering. If the 16-50 is okay on this
score, then I'll just try it for a while, but checking to make sure
that it focuses to infinity properly at 16 mm. It may still go back
to Pentax to be looked at. Or maybe not.
Joe
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