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Old 02-03-2010, 01:16 PM
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Default Little Dots on some images... Need some help

I noticed these little dots in the middle of some of my photos... the interesting thing is that they are on some and not others....

I need some help in decifering what caused this and what to do... and any idea why not on every photo?

Please see this shot...
Moon & Sky
* view on large and you will see the little dots in the middle.. *shot with 18-55kit
but..
cannot see them on this shot
<Power *this shot was taken with a different lens *shot w 55-200VR

nor on this shot, which is again shot with the 18-55kitPost



ive cleaned the outside of the lens numerous times...
now thinking about it, it might be on the inside of the lens for where it mounts?

thoughts... suggestions?
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Old 02-03-2010, 01:41 PM
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If you mean the bluish blob near the moon, it must be lens flare...
Understanding Camera Lens Flare

The smaller dots in the night sky I assume as being stars...

Cheers!
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Old 02-03-2010, 01:51 PM
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The first one looks like lens flare. Or it could be dust particles. If you use flash the light will reflect off of floating dust particles and bounce back to the lens. I don't really see anything in the additional photos other than sensor noise. To reduce sensor noise lower your ISO.
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Old 02-03-2010, 02:33 PM
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Neither...
Thank you for your responses... but I am not talking about the flare that I got... and not noise, but literally little dots... but cant be seen on this site.. have to do them under the flickr large format at least to see them

i have other photos at home i will upload tonight to also show them
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Old 02-03-2010, 02:45 PM
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It took a bit but I finally see what your talking about. Looks odd how they're clustered around that column but it doesn't look like any are "on" the column. Did you say you have other photos that show them, too? Are they long exposures, too? Maybe that has something to do with it? Sort reminds of very, very, tiny dust particles but if that was they case, you'd think they'd show up in all your pictures.
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Old 02-03-2010, 02:54 PM
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You have two possible problems. Firstly, the obvious flare issues which can be attributed to the cheap UV filter you have on the front of your lens. Take it off when shooting into bright lights like the sun or long exposures at night. Secondly, there appear to be some hot pixels which can be attributed to the long exposure of the sensor. Try pixel mapping them out from the settings menu.
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Old 02-03-2010, 03:19 PM
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That looks just like dust on the sensor, and a lot of it.
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Old 02-03-2010, 03:20 PM
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on the sensor.
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Old 02-03-2010, 03:25 PM
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I'm not sure that's dust. It doesn't look random enough. Here's a trick to get a good visual of what's on your sensor. Go outside with 2 lenses. Stop the lens down to f/22 (a must) or greater and take a picture of a completely blue sky....ie, no clouds or anything else...just blue. This will definitely tell you if there's dust on the sensor. They will appear as black spots. Do the same thing with another lens. If the pattern is the same, then it's the sensor and not the a lens issue.

Last edited by equilution; 02-03-2010 at 03:29 PM.
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Old 02-03-2010, 04:13 PM
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yep... those are the dots...
thank you for enlarging them up there for me...

if its on the sensor... wow... that sucks as its an almost brand new camera and have had the lens off maybe 3 times... wow...

i will have to try that with the two lenses, thank you for the trick.. but, when i was borrowing the 55-200 that I took that middle shot on, i did notice on a few of the photos from there...
so... i am pretty much saying that yes its on the sensor then.

thank you!
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