Huginn Kenningar
lvl.4
Flight distance : 49635259 ft
Spain
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It's a spot of dust in the sensor, I have the same problem, although mine is a bit smaller, but also on the lower right corner, feel welcome to the club XD
I just post-process it whenever it's visible. You can use one of the photos of the wall to paint an accurate mask and then just brighten the area a bit, as the spot won't move it's quite easy to do.
On the video side is more annoying, but it can also be post processed.
Theoretically if it's simmilar to the Mavic 2 camera, you can open the sensor from the back and clean it, but you'll lose the warranty and you won't be able to reinstall it parallel to the image plane again, it will always be a slight difference (It's screwed I think, so tension on the screws will affect the position of the sensor), and thus you'll get focus problems on the image. Another "solution" is change the gimball/camera, and that is what DJI will make if you send the drone for repairs I suppose.
I didn't send the drone just for the spot of dust, because It will probably be like a month without the drone and they don't tell you in advance if you'll have to pay or not, so I just prefer to post-process it for the moment, but if more dust comes in the sensor (specially in the center area of the image) I'll just use the warranty and return the drone to the dealer, sensor should be dustproof, as it can't be cleaned at all (unlike all DSLRs with interchangeable lenses).
Just hope Dji makes their sensors easier to clean or trully dustproof.
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