5D3: Dead pixel group or what?

Hello,

I have 5D3 which has quite big black spot on sensor. Tried to clean it, but it won't gave up. It evenly appears on F1.2 aperature, so I don't think that it is dust.

Maybe I can get rid of it somehow? See below image. One is sized to pixel size, so there is ±10 pixels which has variuos colour Maybe someone also had this problem?

Would dead pixels have colour?

I also think that the are just black. But then what it can be? :/

Go into the menus and do a manual cleaning. If they are mapped out, then they were stuck pixels and problem solved. If not, then you need to look deeper.

If it's showing up at f/1.2 it's not dust. It's possibly something stuck in the AA filter close to the pixels.

Snowyman wrote in post #16837556
Would dead pixels have colour?

It's possible given that each pixel is actually made up of a number of photo sites.

Note in the below diagram, each pixel is a 2x2 block.

Gregg.Siam: doen this, but problem still apparent ;[

Shift7 wrote in post #16837744
Gregg.Siam: doen this, but problem still apparent ;[

Send it into Canon. They'll take care of you. You have something smudged on top of your sensor. Just have to get it cleaned professionally because it's not dust.