Hi everyone! My Canon t3i's viewfinder is super blurry. I've tried adjusting the diopter and that's not the problem it seems. When I look into the diopter from 4+ inches away I see a black rectangle that looks to have fallen out of place. As I place my eye to the optical viewfinder, I no longer see the rectangle but it's totally blurry and nothing is in focus.
My images are still great but I'm unable to use my viewfinder to take photos which is a bit of a pain, since I can't effectively manually focus. A photographer friend of mine mentioned that it looks as though the "seal" has come undone and told me that the object is the reason for the blurriness.
[image|1060605]
any advice as to how to open my camera to find and fix whatever object is in the way?