I have problems with the aperture, it is not smooth, I have to make a lot of effort to change the aperture, does not fit my olympus em10 mark iii, so if you have an Olympus camera. I don't recommend this unless I'm attaching the lens mount to the camera. I have over 7 lenses on this camera and this is the first time I have had this problem. However the picture is great and for the video I would give 3/5