On Dec 6, 2010, at 4:16 PM, Miserere wrote: > On 6 December 2010 16:03, paul stenquist <pnstenqu...@comcast.net> 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 > —M. > > \/\/o/\/\ --> http://WorldOfMiserere.com > > http://EnticingTheLight.com > A Quest for Photographic Enlightenment > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
