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Old Mar 17, 2006, 6:01 PM   #1
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Hello, just bought the 20D. Took some pictures of the blue sky and when I put it on my computer, I can see black specks. When I zoom the picture to 300 or 400 percent I can see the specks very clearly. When unzoomed, you can barely see the black specks.

I have tried cleaning both ends of my lens and also used a blower to clean my CMOS sensor. I am still getting the specks. It appears at the same spot on every pictures.Actually only onpicturesof thesky. You cannot seethe specks on other pictures.

Thanks for anyone's help.
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Old Mar 17, 2006, 7:35 PM   #2
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Sounds like dust problem, why don't you post a recent pic (especially one with blue sky) so we can see them. More likely you're just missing the dust when you use the blower.

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Old Mar 18, 2006, 5:23 PM   #3
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here are some pics, unable to hightlight the specks but can you see them? there's quite a few specks
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Old Mar 18, 2006, 5:39 PM   #4
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how do you post a pic?
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Old Mar 18, 2006, 11:05 PM   #5
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When writing a new message or reply there is a blank box with a browse button next to it. click the browse button and then go to the picture you want to send and double click on it. That will put the picture's name including what drive and stuff. Then click the save button when finished with your message.

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Old Mar 19, 2006, 8:52 AM   #6
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Dust on your sensor. Even a brand new camera will have it. Take a shot of the sky with the aperture stopped down(f/22 or smaller). Yuck, dust, it's a fact of life with DSLRs. Usually a good blow from a good bulb blower such as a Giottos Rocket will suffice, it won't be perfect but will clean things up to a tolerable level. Apparently you have a stubborn bit, in that case a wet method like Copperhill may be necessary.
Try looking up:
Visible Dust
Copperhill Method
Speck grabber
Giottos Rocket Blower
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Old Mar 19, 2006, 2:58 PM   #7
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I will try using Giottos Rocket and update you guys on this. Many thanks for the help. I was starting to worry that my camera could be defective. Luckily it's is only dust.
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Old Mar 20, 2006, 1:03 AM   #8
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I have the giotte rocket and it works really well. my sensor was filthy!!! but, now i only have 1 difficult spot which can be cloned out. it's a nice product.

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Old Mar 20, 2006, 8:08 AM   #9
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Get some good advise from your local Canon dealer on cleaning the dust off your sensor. Some good one on one instruction hasn't hurt anyone. Doesn't matter that maybe you didn't buy it there. I've found Canon reps very helpful.

style="BACKGROUND-COLOR: #000000"It doesn't take much to blow the dust out so don'trush in to 'attack the dust' and cause some surface damage on the sensor.
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Old Mar 21, 2006, 7:40 PM   #10
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Can we use a brush on the mirror? Does dust get on the mirror? Do you have to clean that also or just the image sensor? Can we use a brush on an image sensor? Still waiting for my Giotto Rocket blower. Just bought it online and waiting for it to come. Thanks for the help
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