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vodanh1982 · 08-29-2011, 06:04 PM

I have switched 2 different lenses and used sensor cleaning but the spots are the same.

Thanks

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Adam · 08-29-2011, 06:19 PM

No, that looks like dust. Try using a rocket blower to clean your sensor.

vodanh1982 · 08-29-2011, 06:25 PM

They disappeared at F8 or wider. I just wonder if they are dust, will they disappear at wider aperture like the stain?

twitch · 08-29-2011, 06:51 PM

You just have dust, that is not stains. Stains have a distinctive spot in the middle and dark halo around them, and they typically appear in strings. Dust is typcially a solid spot(s) and don't usually form strings.

vodanh1982 · 08-29-2011, 07:08 PM

OK, thanks

Adam · 08-29-2011, 07:18 PM

And yes, it is normal for dust to be more visible at smaller apertures.

08-29-2011, 06:19 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	No, that looks like dust. Try using a rocket blower to clean your sensor. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

08-29-2011, 07:18 PM	#6
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	And yes, it is normal for dust to be more visible at smaller apertures. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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08-29-2011, 06:25 PM	#3
vodanh1982 Senior Member Join Date: Aug 2011 Posts: 126 Original Poster	They disappeared at F8 or wider. I just wonder if they are dust, will they disappear at wider aperture like the stain?

08-29-2011, 06:51 PM	#4
twitch Veteran Member Join Date: Nov 2009 Posts: 4,571	You just have dust, that is not stains. Stains have a distinctive spot in the middle and dark halo around them, and they typically appear in strings. Dust is typcially a solid spot(s) and don't usually form strings.

08-29-2011, 07:08 PM	#5
vodanh1982 Senior Member Join Date: Aug 2011 Posts: 126 Original Poster	OK, thanks

Is it sensor stain?

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