I brought my Chaika 2M while on a trip to the city of Östersund in the Northern (half) part of Sweden. I exposed on Fomapan 400 rated at 1600 ASA. The lens is a 50 mm Industar-22 A few times the shutter decided to lag, giving me these star-shaped (aperture-shaped actually) photos. I hope that the stickiness won't last. The above photo was cropped quite a bit to make it more focused on the centre. I suspect that the rounded corners are a result of the lens barrel size. With the Chaika I am used to getting rounded corners, but not of this magnitude. I am not so surprised - the lens is not made for this type of camera, so I would expect varying results anyway. Visit my Etsy shop for cameras and related stuff, the facebook group on modding lenses and cameras or my Instagram account ourbooksmalmo .