To Rick and the group,
Dust on the lens, front, back or inbetween will never be in focus at the
"film plane". Furthermore, scratches, pits and bubbles (for which some
pre-WWII lenses were famous) will not be readily apparent either. The worst
these flaws can do is lower contrast due to light scatter.
Stan Patz NYC
[EMAIL PROTECTED]
www.PatzImaging.com
Hi Wayne,
Have you checked the front and back elements of your lenses? Truthfully
this doesn't look like the typical dust issues I have seen on a digital
sensor. They are too defined and almost in focus. Dust on your sensor
would block several pixels and would look more like a giant blob of
fuzzyness rather than a defined spot on the photo. Shine a light through
the back of your lens at look at the front element for the culprit if
you haven't already...
Good luck,
RH
-----Original Message-----
I'm starting to do more macro work with my 5D, in which high
F-stops are common. At high F-stops, dust becomes more in
focus, while at lower F-stops is not visible (below F11-16).
Here is a macro shot I made yesterday at F32 using 180mm
macro plus 1.4x converter. Notice the dust on the right.
http://www.airsprite.net/OM/dust_MG_3717.jpg
100% crop of right side:
http://www.airsprite.net/OM/dustcrop_MG_3717.jpg
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