[. . . ] [. . . ] *3 The camera's exposure metering and flash control system do not work properly when shifting and/or tilting the lens, or when using an aperture other than the maximum aperture. Shifting and/or tilting the lens to a large degree can cause some vignetting. 3 When used at smaller aperture than f/11 with high shutter speeds, there is occasional uneven exposure. And when used at smaller aperture than f/11 with high shutter speeds, there is occasional uneven exposure. [. . . ] [. . . ]