Bright center sport when stopped down?

Joined
Sep 12, 2005
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1,164
Location
Roseville, California
I shot this as a dust check. D70, w/ 50mm 1.8 stopped all the way down to f/22. Picture is of a blue sky that I then manipulated and pumped up the contrast to make the dust spots more visible. That process also amplified the bright spot in the center which I could already see as shot. Any idea what it is? Is it because I stopped the lens all the way down?

Thanks in advance.

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I can't seem to get the image to post at all. One of those days!
 
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Joined
Sep 12, 2005
Messages
1,164
Location
Roseville, California
I did the same test with my 18-200 and it does not show up at all so it's not the camera. Could it be the shape of the aperture blades on the cheap lens stopped all the way down?
 
Ron, you do need to add .jpg at the end of your URL, then of course add the
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at each end of your URL:



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Oh, yours showed up as I was fiddling with this! LOL!
 
Joined
May 11, 2005
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Location
Chicago, IL
Ron, you do need to add .jpg at the end of your URL, then of course add the
Subscribe to see EXIF info for this image (if available)
at each end of your URL:



Subscribe to see EXIF info for this image (if available)



Oh, yours showed up as I was fiddling with this! LOL!
That's because I swooped in to make a slight adjustment on Ron's behalf.
 

gvk

Joined
Jun 17, 2005
Messages
388
Location
Mystic, CT
The spot is likely a reflection off the camera's sensor that is partially re-reflected by some lens elements. I believe that this is a known problem with the 50 mm f/1.8 and some other older lenses that apparently have either less effective coatings or uncoated internal or rear elements. These reflections usually only occur when bright light sources are in or near the frame.
 
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