What Is Their Maximum Aperture Canon EF 50mm f1 8 vs Canon EF S 18 55mm

Please check the photo carefully. There are many tiny scratches on the front element. Please feel free to contact me for any questions! There is no balsam separation. There are no large dusts. Exc+5? canon 50mm f/1.8 leica screw mount ltm l39 fixed prime lens from japan no problem in the shooting.