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Old Dec 22, 2006, 7:03 PM   #1
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shot with vivitar series 1 105mm macro







question is about last photo, here's a 100% crop of this picture. after dowloading to my HDD I noticed all this black spots, it seems like dust on the front element. after clening it didn't appear anymore. did anyone else noticed something like that? it was shot at pretty small aperture (f25) I thought that with macro you wouldn't have problem with that kind of thing because of very narrow DOF.



any comments welcomed

greg
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Old Dec 23, 2006, 9:33 AM   #2
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these make me miss the season.
the dust to me appears to be on the subject. for dust to show up on the front lens it would have to be HUGE.. to ck the sensor open a full screen image of nothing but white on your monitor. shoot a f22 1sec exposure of the screen. open exposed image to full size and hit auto levels. believe me, you will see what's on the sensor.

roy
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Old Dec 23, 2006, 9:37 AM   #3
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looked at these again with IE7 & at 400% and i think it's probably on your sensor.

roy
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Old Dec 23, 2006, 9:42 AM   #4
TDN
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yes that looks an awful lot like sensor dust. What fstop did you use?
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Old Dec 23, 2006, 9:56 AM   #5
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that's f25.

it might have been sensor dust, but why so much of it and around whole frame? after blowing sensor and cleaning lens it all dissappeared.

any comments an the photos?

greg
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Old Dec 23, 2006, 10:48 AM   #6
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I thnik they are very cool. Would love to see what it looks like blown up. Looks like a painting.
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Old Dec 23, 2006, 9:25 PM   #7
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Hey Greg,
I like them, though the first one might have used a bit smaller aperture and a bit more DOF. To me, one of the most interesting parts of macro photography is getting to see what your eye cannot. Many of my macro shots contain surprises and/or details I had not seen through the viewfinder. I am glad to see that you like that lens.

Tim
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