EOS 90D Camera sensor scratches

[Sadia]

Hello,

I recently returned from an African safari and needed to clean my lens and camera body. I did everything fine, but once I opened the camera cap and looked at the sensor, I was shocked to see so many scratches (photo attached)! Even though my pictures came out just fine, I was curious to examine (search for spots in the image) if there were any marks on the white paper photo. I checked out some videos on how to do a white paper test to check for spots in the sensor. The white paper photo has no mark on it that I can see (attached). 

I'm wondering if the scratches are common for DSLR cameras. I bought the Canon 90D last year, and it has been great so far. Please let me know if this is something concerning.

Thank you! 

DSLR sensorwhite paper test

[Sadia]

Thank you, Alan. I also hope they are not scratches. I will not clean it myself and try to find Canon support service here. I work in New Delhi and go to US every summer and winter. I'm not confident getting help from local service. If Canon recommends any place I'm happy to take it there. 

[Waddizzle]

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@jaewoosong wrote:

 Canned air has liquid propellant that can deposit some liquid on the mirror surface and the blast of air can spread that liquid around on the surface.  This can happen when people tilt the canned air duster sideways or upside down, allowing some of the compressed liquid to be release with the gas.  The only blower you should be using is a manual bulb blower inside your camera.

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Canned air does not have “liquid properties.”  What you are seeing is condensation caused by the pressure gradient between ambient air and the pressurized canister.  Condensation almost always occurs with longer, sustained sprays, instead of short bursts.

I totally agree that canned air is not suitable for cleaning DSLRs.

[Sadia]

Thank you for sharing the servicing cost. Very helpful!

I bought my camera from Walmart and have the warranty for two years. But I live and work outside the US, so I have to wait until I go there in January.

Btw, in my cleaning pack I don't have that blue wiper that you shared in the photo. I will try to look for it here. 

[Tronhard]

A novice came to me with a severely damaged shutter - he had taken to the camera with a can of compressed air that got under the shutter and destroyed it.  SERIOUSLY TO BE AVOIDED.

[jaewoosong]

Canned air is compressed hydrocarbon gas in liquid form.  If used/dispensed improperly, such as sideways or upside down, the liquid gas can be dispensed and freeze objects in blast radius (including moisture in air) before it boils off and reverts back to gas form.

Gas duster - Wikipedia