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 a crucial factor to consider 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 equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended 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 Lenses in Sony Alpha Mount for Size Comparison
Filter Threads
The Sony DT 35mm F1.8 SAM has a filter size of 55mm whereas the Sigma 35mm F1.4 DG HSM 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 55mm filters that we recommend you to consider for the Sony DT 35mm F1.8 SAM:
And these are the 67mm filters that we recommend for the Sigma 35mm F1.4 DG HSM:
Lens Mounts
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.
Focal Range
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.