The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony FE 40mm F2.5 G and the Sigma 40mm 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. Sigma 40mm F1.4 DG HSM A is the longer of the two lenses at 157mm. The Sony FE 40mm F2.5 G with a length of 45mm, is 112mm shorter. Besides being longer, the Sigma 40mm F1.4 DG HSM A also has a larger diameter of 88mm compared to the Sony FE 40mm F2.5 G's 68mm 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 40mm F2.5 G weighs 173g, which means it is 1087g (86%) lighter than the Sigma 40mm F1.4 DG HSM A which has a weight of 1260g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Lenses in Sony E Mount for Size Comparison
Filter Threads
The Sony FE 40mm F2.5 G has a filter size of 49mm whereas the Sigma 40mm F1.4 DG HSM A has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 49mm filters that we recommend you to consider for the Sony FE 40mm F2.5 G:
And these are the 82mm filters that we recommend for the Sigma 40mm F1.4 DG HSM A:
Lens Mounts
Both the Sony FE 40mm F2.5 G and the Sigma 40mm F1.4 DG HSM A has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5, Sony A7R VI and Sony A7 V.
Sigma 40mm F1.4 DG HSM A is also available in Canon EF , Nikon F (FX), Sigma SA and Leica L mounts.
Focal Range
Both lenses have the same focal range of
40mm but while Sony FE 40mm F2.5 G has the fastest aperture of
F2.5, the Sigma 40mm F1.4 DG HSM A's widest aperture value is
F1.4.
