Author Topic: Guide to check for Dirt on your camera sensor  (Read 2792 times)

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Offline eddieitman

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Guide to check for Dirt on your camera sensor
« on: November 28, 2010, 09:12:56 AM »
I noticed that i seem to have a few issues with my camera not being as sharp as it should be. So i set about trying to find a way to check the dirt on the cameras sensor and after finding the best way to do it i thought i would share
Here is what you will need
Camera, a close focusing Lens, Computer, Monitor, and Photoshop
1st things 1st
Set the camera to have no image stabilization, remove D-Range optimization, etc
Set the focus mode to Spot
Now clean the monitor make sure it is nice and clean
make sure the lens is clean on the camera as well
Now open photoshop and create a new file and ensure that it is white
Now set the camera to manual focus and focus on the screen (you can have a page open with text just to ensure that you get focus and then move back to photoshop)
Set the camera to the minimum aperture F22 or higher depending on the lens
Now take a picture of white area only on the screen and ensure to move the camera a bit so that whe know that we are not getting images of dirt on the screen
take the picture we have taken and open in photoshop and do the following
and you will then see the magical world of your sensor here is mine

Sony A700
Beercan 70-210 F4
Minolta 35-105 F3.5 Macro hacked
Minolta 35-70 F4 with Macro Hack
Minolta 50mm F1.7 prime
Tokina AF 70-210mm
Tamron 17-50mm F2.8 A16
Tamron 70-300mm A17 DI LD
M42 Manual Focus Lenses. Jupiter 11a, Chinon 55mm F1.7, Helios 44M-4, Super Takumar F2 55mm, MIR 1B 37mm

Offline Clive

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Re: Guide to check for Dirt on your camera sensor
« Reply #1 on: December 02, 2010, 11:03:59 PM »
Thanks for this. Good idea. Not tried yet, but will this evening!


Not everything that counts can be counted, and not everything that can be counted, counts. Albert Einstein