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. Â 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.
—M.
\/\/o/\/\ --> http://WorldOfMiserere.com
http://EnticingTheLight.com
A Quest for Photographic Enlightenment
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