Canon EF 28 mm f/1.8 USM
One of the oldest lenses in the Canon's current line-up is an EF 28 mm f/1.8 USM model, as it was launched on the market in September 1995. Why the company doesn't see any need to introduce its successor
good build quality; very good image quality in the frame centre (apart from the maximum aperture); slight distortion; low level of vignetting on APS-C; silent and quick autofocus
weak image quality at the maximum relative aperture; low resolution at the frame edge of an APS-C and full frame sensor alike; quite significant chromatic aberration; huge coma; unsatisfactory accuracy of the focusing mechanism