The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 105mm F1.4 DG HSM and the Carl Zeiss Makro-Planar T2/100 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 105mm F1.4 DG HSM is the longer of the two lenses at 132mm. The Carl Zeiss Makro-Planar T2/100 with a length of 113mm is 19mm shorter. Besides being longer, the Sigma 105mm F1.4 DG HSM also has a larger diameter of 116mm compared to Carl Zeiss Makro-Planar T2/100's 76mm diameter.
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. Carl Zeiss Makro-Planar T2/100 weighs 680g, 58% (965g) lighter than the Sigma 105mm F1.4 DG HSM's weight of 1645g.
Lens Mounts
Both Sigma 105mm F1.4 DG HSM and Carl Zeiss Makro-Planar T2/100 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 105mm F1.4 DG HSM is also available in Canon EF , Sigma SA and Sony E mounts.
Carl Zeiss Makro-Planar T2/100 is also available in Canon EF and Pentax KAF mounts.
Focal Range
Sigma 105mm F1.4 DG HSM is a prime lens with fixed focal lenght of 105mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 157.5mm.
Carl Zeiss Makro-Planar T2/100 is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 150mm.