The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 24-35mm F2 DG HSM A and the Voigtlander 28mm F2.8 Color Skopar SL II 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 24-35mm F2 DG HSM A is the longer of the two lenses at 123mm. The Voigtlander 28mm F2.8 Color Skopar SL II with a length of 25mm is 98mm shorter. Besides being longer, the Sigma 24-35mm F2 DG HSM A also has a larger diameter of 88mm compared to Voigtlander 28mm F2.8 Color Skopar SL II's 63mm 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. Voigtlander 28mm F2.8 Color Skopar SL II weighs 180g, 80% (761g) lighter than the Sigma 24-35mm F2 DG HSM A's weight of 941g.
Lens Mounts
Both Sigma 24-35mm F2 DG HSM A and Voigtlander 28mm F2.8 Color Skopar SL II 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 24-35mm F2 DG HSM A is also available in Canon EF and Sigma SA mounts.
Voigtlander 28mm F2.8 Color Skopar SL II is also available in Canon EF mount.
Focal Range
Sigma 24-35mm F2 DG HSM A has a focal range of 24-35mm and 1.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 36 - 52.5mm.
Voigtlander 28mm F2.8 Color Skopar SL II is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 42mm.