On Dec 6, 2010, at 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. > I repeated the test with white paper. Still no blobs at f22. Just out of focus paper. Paul > > —M. > > \/\/o/\/\ --> http://WorldOfMiserere.com > > http://EnticingTheLight.com > A Quest for Photographic Enlightenment > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions.
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