Some of the defects/features that the Holga is famous for are vignetting, light leaks and focus problems. There are 2 f/stop settings that give roughly f/11 and f/8. The focus is adjustable, but since the camera isn't SLR, it's a guess at best. The shutter speed is somewhere between 1/60 and 1/100 depending on the camera and what the spring-loaded shutter feels like doing.