PlymSpotter
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Dust Spots

Fri Jun 17, 2005 7:10 am

Hi,

Recently I have been having problems with dust spots, I shoot with a 300D and lenses 18-55 + 75-300. I didn't want to post a topic here until I had tried everything else I could think of, including a search. I clean the lens's and the camera before any major use but the spots just keep coming back! I got the below accepted, but within two hours (having not taken the lens off) there was stuff all over it again.


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Photo © Daniel Gaston SELCAL



two hours later;


I'm not quite sure what I'm doing wrong but would appreciate any help,

Thankyou,

Dan Smile
...love is just a camouflage for what resembles rage again...
 
Newark777
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RE: Dust Spots

Fri Jun 17, 2005 7:19 am

When you say you clean the camera, what exactly did you clean? It looks as though you need a good sensor cleaning.

Harry
Why grab a Heine when you can grab a Busch?
 
PlymSpotter
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RE: Dust Spots

Fri Jun 17, 2005 7:25 am

The lens glass and I use a blower to get rid of the dust inside the camera body, and a cloth if its really bad. Was given a few tips by the camera shop where I bought it, but the spots return.

Thanks,

Dan 

Edit - I have cleaned the surface of the sensor with a cloth (not a swab) that was supposed to pick up dust, which it did, but it reappeared)

[Edited 2005-06-17 00:31:39]

[Edited 2005-06-17 00:32:19]
...love is just a camouflage for what resembles rage again...
 
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jumbojim747
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RE: Dust Spots

Fri Jun 17, 2005 7:31 am

Dan .
By using an air blower your not actually getting rid of the dust your just moving it around.
When you tilt the camera upwards and shoot the dust settles back down on the sensor.
If you have to blow air into the camera i think it might be an idea to tilt the camera upside down and leave it for a few minutes to settle then the dust might make its way out .
Anyway good luck with it
On a wing and a prayer
 
DLKAPA
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RE: Dust Spots

Fri Jun 17, 2005 10:49 am

I clean my cam with a blower, what I find is easiest is to tilt the blower up 45 degrees and then put the camera at the same 45 degree downward angle so I'm blowing straight into the camera. Then I make about 4 or 5 quick bursts of air to agitate the dust enough to let it fall down on its own. Works pretty well I might add.
And all at once the crowd begins to sing: Sometimes the hardest thing and the right thing are the same
 
bubbles
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RE: Dust Spots

Fri Jun 17, 2005 11:19 am

Quoting DLKAPA (Reply 4):
put the camera at the same 45 degree downward angle

Hi Eric,

Sorry for my stupid questions!

What do you mean "downward angle"? Do you mean you put 45 degree up-side-down?

_Hongyin_
 
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RE: Dust Spots

Fri Jun 17, 2005 8:30 pm

Hi, thanks for all the replies. I will have a go at cleaning it upside down and see if they still come back. Does anyone have any tips for changing lens's without getting dust in the camera, or is it inevitable?

Thanks!

Dan Smile
...love is just a camouflage for what resembles rage again...
 
ua777222
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RE: Dust Spots

Fri Jun 17, 2005 8:35 pm

Also dust spots will not show at certain f stops. What might show up at F11 might not show up at F8. Try to see what F stop they are at so that if they keep coming back just stay away from that F stop...

Just a 4am idea.

Matt
"It wasn't raining when Noah built the ark."
 
ChrisM001
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RE: Dust Spots

Fri Jun 17, 2005 9:10 pm

Sensor dust is one of the curses of modern DSLR's. A good check of how much is on your sensor is to take a shot of the sky at F22, then run an auto levels on it - scary to see how much there is!! Another way is to go to image/adjustments/equalize. For all the pics I upload I create a duplicate layer, equalize it, then go back to the original layer and use the healing tool on the spots. I then delete the duplicate layer.

If you are not getting visible marks on your images at the normal aperture range, you may not want to start messing around with your sensor. But once they show it is annoying to see them.

There are ways to clean the sensor. If you do a search on dust spots you are bound to find many threads. I use the copperhill cleaning method, not too difficult to do:

http://www.pbase.com/copperhill/ccd_cleaning

Hope this helps.

Chris
 
bubbles
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RE: Dust Spots

Fri Jun 17, 2005 9:13 pm

Quoting PlymSpotter (Reply 6):
Does anyone have any tips for changing lens's without getting dust in the camera, or is it inevitable?

Hi, Dan,

I have ever seen someone in this forum or dpreview suggested the following steps.

- Get into the washroom
- Turn on the shower, then close the door
- Keep the shower on for half an hour
- Bring your camera into there
- Do whatever you want, such as, clean up sensor, change lens, etc.

The main purpose of keeping shower on is, I think, to increase the humidity which could make dusts and small fibres (fuzz) less flying in the air.

I couldn't be able to know if it's a joke. To be honest, in spite of knowing that I never lock myself in the washroom to clean the sensor or change lens.  Wink

_Hongyin_
 
Psych
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RE: Dust Spots

Fri Jun 17, 2005 10:14 pm

Quoting Bubbles (Reply 9):
I couldn't be able to know if it's a joke

If it isn't a joke, it sounds vaguely mad, Hongyin!

Though I am by no means an expert, I would suggest strongly that another thing you definitely want to avoid getting on your sensor glass is moisture. The 'bathroom' scenario sounds like it would be a dead cert for that.

I have found 'dust' spot problems with my sensor that are not in fact dust. They look more like the spots left by droplets of moisture on the glass, or marks created by a bit of something long gone, but the mark remains, partly due to moisture.

My view is that dust spots are inevitable for a DSLR that is in use, unless you are using a fixed focus lens that you never remove. As soon as you take a lens off you allow the air - with all that that contains - dust, moisture droplets and all - to get in to the body. Also, any use of a zoom sucks in air every time it is zoomed in and out, as it is not completely air tight. The only solution is to clean the sensor glass - scary though that is initially.

But I do agree with the point made earlier that a sensor that looks dreadful at f22 can look fine at f8, so that is a key factor. If you have the lens quality to do it, and depth of field is not key to your image, a wider aperture helps disguise the problem.

Take care.

Paul
 
bubbles
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RE: Dust Spots

Fri Jun 17, 2005 10:47 pm

Quoting Psych (Reply 10):
If it isn't a joke, it sounds vaguely mad, Hongyin!

Mmm... now I know it must be a joke! Sorry about that!  blush 

_Hongyin_
 
PlymSpotter
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RE: Dust Spots

Sat Jun 18, 2005 2:21 am

That's not the craziest suggestion I have had Bubbles, some guy suggested that I stick the Hoover on the front of my camera to suck the dust out! Matt; I sort of ran out of f stops with no dust! That site has a lot of great info on it Chris, if possible I want to avoid having to use swabs but its always worth a try. I think there is certainly one of the spots Paul which may have arrived into my camera whilst changing lenses in the cab of a steam engine, (daft and without doubt the worst place to have to do it, but I had no choice) that's when I first noticed it, so perhaps it is some kind of residue as it doesn't budge with the blower.

Thanks again for all the help,

Dan Smile
...love is just a camouflage for what resembles rage again...
 
Go3Team
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RE: Dust Spots

Sat Jun 18, 2005 8:36 am

Sensorswab, pecpads, and eclipse. Works everytime.
Yay Pudding!

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