Irix 45mm F1.4 is a Manual Focus (MF) Standard Prime lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF2 mount lenses.
Irix 45mm F1.4 is compatible with cameras that have Pentax KAF2 lens mount.
Max sensor coverage of Irix 45mm F1.4 is 35mm FF.
Irix 45mm F1.4 has a fixed focal lenght of 45mm. When mounted on a 35mm FF format camera, it provides an 35mm (FF) equivalent of 45mm.
Irix 45mm F1.4 has a max aperture of F1.4.