I tried Sony 10-18mm f4 lens on my A7r and results are nothing like what I saw from other people pics with the same combo. People said it should be usable from 12 to 16mm. Here's one review from Brian Smith. Note that he only get light corner vignette at 12mm. Dark circular at 10mm, but not the weird shape I got. http://briansmith.com/sony-a7r-10-18-e-mount-lens/ I set aps-c mode to OFF and turn OFF all lens correction in camera. Shot in JPG and resized for upload. Please take a look here and tell me what's wrong with my camera? Check filename for the focal length setting. Edited: Link to samples removed. I sent the camera in to Sony services couple months ago for light leak and loose lens mount & they fixed both issues. Don't know what else they did that would create that weird dark frame on the 10-18mm lens. Both FE 35 & 55mm lenses worked fine. The 10-18mm lens worked fine on A6000 and A7r crop mode. Updated: Problem solved. Thanks to michelb for pointing out the issue: can't use the shade on such wide angles.