Strange artifacts on XT-3 raw files.

[rlginer]

Hi, yesterday I noticed some strange square shaped artifacts as well as a nasty grain in my raw files. It's only seen when enlarging to a great degree but there are things there that shouldn't be. It very strange as they appear in most images but not others. The ugly grain affect gets substantially worse if I attempt to sharpen. Noise reduction improves the grain but doesn't do much for the square or sometimes L-shaped artifacts. I always have sensor cleaning on, so I don't think it's a dirty sensor. Any help would be appreciated.

https://www.amazon.es/photos/share/66NfvMAkAMbMrquYnxUcwtqnaHc7qwmeDp2DI3UKAvu

https://www.amazon.es/photos/share/IKFlNU5RELyYEntW5Gtg96SwIMoiHI9nmQF7ByXUrFg

 

[jerryy]

Have you tried using the sensor swab (and liquid) approach?

The in-camera sensor cleaning is limited in what it can accomplish. There is no way for the dust it knocks off of the sensor to leave the body, so that dust will swoosh around inside the body and as soon as the camera is moved, some dust lands back on the sensor.

Those dust blower bulbs can remove some dust as long as the compartment is sealed so that dust leaves and does not just move to other areas in the camera. These though,  will not remove very much dust that has strong electrostatic charges almost seeming to glue the dust to the sensor.

Try the swab approach as well as cleaning the lens’ rear glass and see if that helps.

p.s. Welcome to the forum.

[Greybeard]

Maybe try taking a photo at something like f/16 of a plain white wall and see if you get the problem.

if so then follow Jerry’s advice.

[rlginer]

Thanks for the advise. The lens is clean, the sensor should be clean as this camera is used mainly for shots on the street which I don´t do much of. I´ve blown the sensor with a bulb and I´ll try the plain white shot to see what shows but the I don´t think the sopts loo too much like dist. They are very pixel shaped with sharp edges. Thanks for the welcome!