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10/05/2005 11:15:12 PM · #1 |
Hi, is shooting a full white or full black image a good way to detect sensor dust?
does dust on lense create major problems?
what about finger prints on lense? |
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10/05/2005 11:17:22 PM · #2 |
I would use a white object or the sky. Black/brown dust won't show up against a black background. Use f/22 or smaller. Shooting up at a clear sky works as well. Dust is more irritating than anything.
Finger prints on a lens would create less sharp images, I believe. You want your sensor and glass as clean as possible when shooting.
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10/05/2005 11:21:37 PM · #3 |
The only time you can possibly get sensor dust is if you change lenses a lot. dSLR users have this problem all the time. To detect them, try shooting on a plain white paper with the paper a few feet or inches away from the camera.
On any given time, I have a bunch of sensor dust which I absolutely despise during the open challenges. The dust might be a speckle but it gets magnified once on the image.
Here's an example from a recent challenge.
Finger prints are also quite deadly but not as much. It's the oils in our fingers that create this and if gone un-noticed, it can wreak havoc on an image IMHO. My advice is to clean the lens prior to a shoot. I do it a lot specially with my CPL and my UV filters.
Here's an example of a finger print smudge that was tiny but was again magnified.
A good rule of thumb is to clean your glass often. Better safe than sorry only finding out that perfect capture has dust or prints that you can't clone out in the basic challenges.
Good Luck! |
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