I've had it for over a year but thus far I've rarely shot flat
subjects wide open and I'm not much of a pixel peeper so it may well
have escaped me until now. I'll go for the wall then. The idea was to
have something to show to Pentax when I drive over there.
Ecke
2010/11/29 paul stenquist
hi all
a lot of the photos taken today lead me to think my 16-50 may be
decentered - there is tons on inexplicable softness in an otherwise
flat field - can anyone please point me towards a link with a chart
that will help me to illustrate the problem for when I turn the lens
in for repair ...
For a flat focus test all you need is a textured wall, a tripod and a level.
Just make sure the camera is parallel to the wall and the lens is perpendicular
to the wall. Then shoot wide open. It was easy to spot the focus error on my
first 16-50. But this is an assembly problem that generally
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