The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 40mm F1.4 DG HSM A and the Hartblei 40mm F4 IF TS for their suitability to various photography scenarios:
Size and Weight Comparison
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods.
Both Sigma 40mm F1.4 DG HSM A and Hartblei 40mm F4 IF TS has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Sigma 40mm F1.4 DG HSM A is also available in Canon EF , Sigma SA, Sony E and Leica L mounts.
Hartblei 40mm F4 IF TS is also available in Canon EF , Pentax KAF and Sony Alpha mounts.