04-08-2013 10:09 PM
That's a FULL FRAME camera & you're using a lens designed for a 1.6 crop body. Not compatible & STOP before you damage the mirror. The Mirror is hitting the back of the EF -S lens.
DO NOT TAKE ANY MORE PHOTOS WITH THAT EF-S lens mounted on the body.
04-08-2013 11:23 PM
04-09-2013 12:52 AM
Somebody just asked about Sigma 10-20mm on 1DX now a 18-200 on a 6D. The lens is not designed for full frame and like 7D5M stated, the lens must be modified in someway. But if I'm not mistaken, lately EF-S lens doesn't have long back to hit the mirror anymore (maybe I've heard it wrong).