The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 30mm F1.4 DC HSM and the Sony FE 50mm F1.4 GM 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 F1.4 GM is the longer of the two lenses at 96mm. The Sigma 30mm F1.4 DC HSM with a length of 63mm, is 33mm shorter. Besides being longer, the Sony FE 50mm F1.4 GM also has a larger diameter of 81mm compared to the Sigma 30mm F1.4 DC HSM's 74mm 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 30mm F1.4 DC HSM weighs 435g, which means it is 81g (15%) lighter than the Sony FE 50mm F1.4 GM which has a weight of 516g.
Filter Threads
The Sigma 30mm F1.4 DC HSM has a filter size of 62mm whereas the Sony FE 50mm F1.4 GM has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sigma 30mm F1.4 DC HSM:
And these are the 67mm filters that we recommend for the Sony FE 50mm F1.4 GM:
Lens Mounts
The Sigma 30mm F1.4 DC HSM has the Canon EF lens mount whereas the Sony FE 50mm F1.4 GM has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount and Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount.
Sigma 30mm F1.4 DC HSM is also available in the Nikon F (DX) and Sigma SA mounts.
Focal Range
Sigma 30mm F1.4 DC HSM is a prime lens with fixed focal lenght of 30mm which has an effective (full-frame 35mm equivalent) focal range of
48mm when used on a APS-C / DX format camera.
On the other hand, the Sony FE 50mm F1.4 GM 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.
