OT - smudge or scratch on sensor

OT - smudge or scratch on sensor - what can I do?

Subject: OT - smudge or scratch on sensor - what can I do?

From: Peter Gotlib <email@hidden>

Date: Sun, 30 Mar 2008 22:15:56 -0400

Delivered-to: email@hidden

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Sorry for the off topic post people - but when it comes to professional photography, this is simply one of the best resources I know if!

I am on a product photography gig and just noticed a large smudge like streak pattern on the bottom left hand side of my pictures.

I haven't used my camera in a while so I do not know how or when this might have happened.

On further inspection, I see a similar pattern on the upper right hand corner of the Canon's sensor.

The Canon's built in sensor cleaning unit fails to remove the pattern.

Nor does using the 'Sensor Brush' from visibledust.com work.

I do not know if the sensor has been blotted by smudge, or damaged by a scratch.

If it is a scratch - I guess there is nothing I can do except have the sensor replaced.

But if it is a smudge - what fluids can be safely used to clean the sensor and how does one go about that?

Or would it just be better to bring the unit into Canon repair?

Thank you for any advice.

Peter G.

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