Badly OOF? Jack
--- On Mon, 12/6/10, P N Stenquist <pnstenqu...@comcast.net> wrote: > From: P N Stenquist <pnstenqu...@comcast.net> > Subject: Re: Latest Pentax Scare: Blobs on K-5 Sensor > To: "Pentax-Discuss Mail List" <pdml@pdml.net> > Date: Monday, December 6, 2010, 1:52 PM > > On Dec 6, 2010, at 4:36 PM, Miserere wrote: > > > On 6 December 2010 16:31, P N Stenquist <pnstenqu...@comcast.net> > wrote: > >> > >> 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 > > > > 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 > > 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. > -- 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.
