The photographer SLR took some pictures of Canon 60d for me, with a white mark on the upper right. What is this?

Such a clear foreign body is obviously not on the lens, but in front of CMOS, which should be a fibrous filament. What a big foreign body, it is useless to use the CMOS dust removal function of the camera itself.

Look at the instruction manual, which teaches you how to adjust the mirror (it should be an option in the menu). After turning it up, take a powerful blowing balloon and blow it hard at CMOS to blow away foreign objects.

If you can't blow it away anyway, don't try again. Take it after sale.

note:

1, never blow with your mouth, the more you blow, the dirtier you get.

2. Do not touch CMOS with any cleaning tools. It is difficult for a novice to clean CMOS.