On 12/6/2010 4:36 PM, Miserere wrote:
On 6 December 2010 16:31, P N Stenquist<[email protected]> wrote:
On Dec 6, 2010, at 4:16 PM, Miserere wrote:
On 6 December 2010 16:03, paul stenquist<[email protected]> wrote:
On Dec 6, 2010, at 3:33 PM, Charles Robinson wrote:
On Dec 6, 2010, at 14:19, Miserere wrote:
Any of you guys with a K-5 experiencing any of this?
http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=37092371
http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=37101106
Maybe you K-7 owners could take a look too. No need to transfer test
images to the computer, the blobs can be seen on the LCD.
Frankly, if the images turn out OK (besides being all green) then there is no problem.
Interesting as a curiosity, but not in a "OMG the sky is falling" kind of way.
Seriously... why would a person even bother looking for something like this
unless it's affecting the output?
And by "affect the output" I mean: can this really be SEEN on something other
than an f/22 shot of a blank grey surface?
It could be seen on any number of small aperture shots. I'm definitely going to
test for it.
Paul
Thanks for the replies so far, and please keep 'em coming.
My test unit has a string of blobs near the center (most people seem
to report them "near the center" for what it's worth). They are
noticeable at f/8 and smaller when photographing a blank surface; I
suspect in real photographs (with plenty of detail) they should
*maybe* be noticeable at f/11 and onwards. I rarely photograph at such
apertures, but I can imagine people shooting landscapes would be
annoyed to find these blobs in their blue skies. Then again, a blob in
a blue sky is easy to clone out. Then again, again, we'd all prefer
not to have to clone out blobs as part of our postprocessing.
I just tested my camera in the same manner as the guy reported on dpreview. I
filled my computer screen with white and shot it with my DA* 16-50 at about
30mm, F stops were f22, f16 and f11. Focus set to infinity. No blobs. Saw a few
specs of dust, Did the sensor clean operation and retested, and the dust was
gone. I get pure white.
Paul
That's good news, Paul.
For what it's worth, my blobs are much better defined using the sky or
a blank piece of paper than the computer screen. Not sure why anyone
would want advice on improving their blob definition, but it's one of
the many useful services I provide to the community.
Because giving back is important.
It's good to know you're a giver.
—M.
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