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07-18-2008, 06:06 AM   #1
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spots

i've been seeing these two spots in particular when i use my DA 18-55. They are more pronounced in the daytime photo than in the night shot. I've cleaned the front element and they still appear. Could these spots be on the rear element? I didn't clean that because it's much harder to get to. Is there a chance these spots are dust inside the lens? if so...i would assume there is nothing I can do?

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07-18-2008, 06:13 AM   #2
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clean your sensor

I believe these are on the sensor.
07-18-2008, 06:28 AM   #3
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Dust on your sensor. Dust on the lens won't be visible in the pictures as spots.
07-18-2008, 07:10 AM   #4
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these do not appear when i use other lenses though.

07-18-2008, 07:42 AM   #5
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Perhaps you should have a closer look at the pictures taken with the other lenses....
07-18-2008, 08:34 AM   #6
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will do. thanks for the help.
07-18-2008, 08:43 AM   #7
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QuoteOriginally posted by Wheatfield Quote
Perhaps you should have a closer look at the pictures taken with the other lenses....
Well...i'll be.

After staring at it for 5 minutes...I'm pretty sure those same two spots are visible, although much, much more faint in this picture. Shot with the 50-200.
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07-18-2008, 08:49 AM   #8
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They are there. Take your original picture and bump up the shadows as far as you can go. You will see the two spots above of the redwinged balckbird at the top of the frame.

07-18-2008, 09:45 AM   #9
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QuoteOriginally posted by DanLoc78 Quote
Well...i'll be.

After staring at it for 5 minutes...I'm pretty sure those same two spots are visible, although much, much more faint in this picture. Shot with the 50-200.
Wait till you try doing macro work. The dust will make you mental. Sensor dust seems to be more of a problem when a short focal length lens is attached than a longer one. I don't know why, but I suspect it has something to do with the angle of the light coming out of the lens being sharper
07-18-2008, 09:54 AM   #10
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Dust will also be more visible with higher aperture settings. When I check to see if I've have dust that needs to be cleaned off, I bump the f stop to 22 and take a shot of the bright blue sky. That will make your spots very apparent. However, on my camera there are always a couple of dark spots even after cleanings. I assume either I have dead pixels in these spots, or a speck of dust under the filter. When these spots appear on my pictures the only solution is to clone them out or just live with it.
07-18-2008, 09:55 AM   #11
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so does the dust reduction function usually take care of these pesky spots?
07-18-2008, 09:55 AM   #12
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Shoot the sky

Put the camera on MF... Set the aperture to F22 or so... and shoot the blue sky. All the dust should show up very clearly...

"so does the dust reduction function usually take care of these pesky spots?"

Sometimes.... but a rocket blower will usually get them if the DR does not. Just dont get a cheap blower. sometimes they have more dust than in them when they are new, than your camera will every have.



OOPS sorry fritz, I did not see your post.

great minds think alike?

Last edited by Igilligan; 07-18-2008 at 10:04 AM.
07-18-2008, 09:55 AM   #13
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aperture will also determine how sharply it appears on the sensor..
07-18-2008, 09:58 AM   #14
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QuoteOriginally posted by Igilligan Quote
Put the camera on MF... Set the aperture to F22 or so... and shoot the blue sky. All the dust should show up very clearly...

OOPS sorry fritz, I did not see your post.

great minds think alike?


That's what happens when 3 people post at the same time.
07-18-2008, 10:56 AM   #15
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This is a recent picture of my dad's, who is over in England right now. We've been trying to figure out what these spots are on his pictures too, which were noticeable when he was using his Sigma 17-70, so again, we thought it was the lens.

I assume these are also sensor dust?
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