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 Nikon F (FX) mount lenses.
Irix 45mm F1.4 is compatible with cameras that have Nikon F (FX) 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.