The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 35mm F1.8 Di VC USD 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 Tamron 35mm F1.8 Di VC USD with a length of 81mm, is 13mm shorter. On the other hand, the Tamron 35mm F1.8 Di VC USD has a larger diameter of 80mm compared to the Sigma 35mm F1.4 DG HSM's 77mm 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. Tamron 35mm F1.8 Di VC USD weighs 450g, which means it is 215g (32%) 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
Lens Mounts
Both the Tamron 35mm F1.8 Di VC USD 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 A99 II, Sony A68 and Sony A77 II.
Tamron 35mm F1.8 Di VC USD is also available in Canon EF and Nikon F (FX) mounts.
Sigma 35mm F1.4 DG HSM is also available in Canon EF , Pentax KAF3, Sigma SA, Nikon F (FX) and Leica L mounts.
Focal Range
Both lenses have the same focal range of 35mm but while Tamron 35mm F1.8 Di VC USD has the fastest aperture of F1.8, the Sigma 35mm F1.4 DG HSM's widest aperture value is F1.4.