The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 50mm F1.2 GM and the Sigma 50mm F1.4 DG HSM A 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. Sony FE 50mm F1.2 GM is the longer of the two lenses at 108mm. The Sigma 50mm F1.4 DG HSM A with a length of 100mm, is 8mm shorter. Besides being longer, the Sony FE 50mm F1.2 GM also has a larger diameter of 87mm 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. Sony FE 50mm F1.2 GM weighs 778g, which means it is 37g (4%) lighter than the Sigma 50mm F1.4 DG HSM A which has a weight of 815g.
Filter Threads
The Sony FE 50mm F1.2 GM has a filter size of 72mm whereas the Sigma 50mm F1.4 DG HSM A has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Sony FE 50mm F1.2 GM:
And these are the 77mm filters that we recommend for the Sigma 50mm F1.4 DG HSM A:
Lens Mounts
The Sony FE 50mm F1.2 GM has the Sony E lens mount whereas the Sigma 50mm F1.4 DG HSM A has the Sigma SA lens mount. Some of the latest released cameras that are compatible with these mounts are Sony A9 III, Sony A7C Mark II and Sony A7CR for the Sony E Mount and Sigma Quattro, Sigma Quattro H and Sigma SD1 Merrill for the Sigma SA Mount.
Sigma 50mm F1.4 DG HSM A is also available in Canon EF , Sony Alpha, Nikon F (FX) and Leica L mounts.
Focal Range
Both lenses have the same focal range of
50mm but while Sony FE 50mm F1.2 GM has the fastest aperture of
F1.2, the Sigma 50mm F1.4 DG HSM A's widest aperture value is
F1.4.