The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony DT 35mm F1.8 SAM and the Sigma 35mm F1.4 DG HSM for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Sigma 35mm F1.4 DG HSM is the longer of the two lenses at 94mm. The Sony DT 35mm F1.8 SAM with a length of 52mm, is 42mm shorter. Besides being longer, the Sigma 35mm F1.4 DG HSM also has a larger diameter of 77mm compared to the Sony DT 35mm F1.8 SAM's 70mm diameter.
The 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. Sony DT 35mm F1.8 SAM weighs 170g, which means it is 495g (74%) lighter than the Sigma 35mm F1.4 DG HSM which has a weight of 665g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Sony Alpha Mount for size comparison purposes.
Wideangle Prime Lenses in Sony Alpha Mount for Size Comparison
Both the Sony DT 35mm F1.8 SAM and the Sigma 35mm F1.4 DG HSM has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A68, Sony A77 II and Sony A58.
Sigma 35mm F1.4 DG HSM is also available in Canon EF , Pentax KAF3, Sigma SA, Nikon F (FX) and Leica L mounts.
Both lenses have the same focal range of 35mm but while Sony DT 35mm F1.8 SAM has the fastest aperture of F1.8, the Sigma 35mm F1.4 DG HSM's widest aperture value is F1.4.