Help:eos 6d body Viewfinder problem , circle surrounded by blackness ( which moves with eye)

Hi, I can't figure out why when i look through the viewfinder. it is a circle surrounded by blackness... if you move your eye around then the viewing circle moves. Doesn't seem to affect the picture taking. But I am unable to see what is in the full frame.
Anybody know what the problem is?

Thanks for your time.

Sentientsoma wrote in post #19494005
Hi, I can't figure out why when i look through the viewfinder. it is a circle surrounded by blackness... if you move your eye around then the viewing circle moves. Doesn't seem to affect the picture taking. But I am unable to see what is in the full frame.
Anybody know what the problem is?

Thanks for your time.

Welcome to POTN. What lens are you using?

Turn off ALO - auto lighting optimizer

But this is something he sees, or rather he doesn't see, in the viewfinder. Polarizing glasses - are you wearing such, maybe?

Do you have a polarising filter on the lens, and wear polarised sunglasses as well looking through the vf?

What lens and lens hood do you have?