The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 50mm F1.4 DG HSM A and the Nikon 28-70mm f2.8 ED-IF for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Nikon 28-70mm f2.8 ED-IF is the longer of the two lenses at 122mm. The Sigma 50mm F1.4 DG HSM A with a length of 100mm, is 22mm shorter. Besides being longer, the Nikon 28-70mm f2.8 ED-IF also has a larger diameter of 89mm compared to the Sigma 50mm F1.4 DG HSM A's 85mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sigma 50mm F1.4 DG HSM A weighs 815g, which means it is 120g (12%) lighter than the Nikon 28-70mm f2.8 ED-IF which has a weight of 935g.
Filter Threads
Both the Sigma 50mm F1.4 DG HSM A and the Nikon 28-70mm f2.8 ED-IF have the same Filter thread size of 77mm.
Below are links to the 77mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 50mm F1.4 DG HSM A and the Nikon 28-70mm f2.8 ED-IF 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 50mm F1.4 DG HSM A is also available in the Canon EF , Sony Alpha, Sigma SA and Leica L mounts.
Focal Range
Sigma 50mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75mm.
On the other hand, the Nikon 28-70mm f2.8 ED-IF has a focal range of 28-70mm and 2.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 105mm.
