The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 35mm F2 DG DN and the Tamron 35mm F2.8 Di III OSD M1:2 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 F2 DG DN is the longer of the two lenses at 65mm. The Tamron 35mm F2.8 Di III OSD M1:2 with a length of 64mm, is 1mm shorter. On the other hand, the Tamron 35mm F2.8 Di III OSD M1:2 has a larger diameter of 73mm compared to the Sigma 35mm F2 DG DN'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. Tamron 35mm F2.8 Di III OSD M1:2 weighs 210g, 35% (115g) lighter than the Sigma 35mm F2 DG DN's weight of 325g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Sony E Mount for size comparison purposes.
Wideangle Lenses in Sony E Mount for Size Comparison
Filter Threads
The Sigma 35mm F2 DG DN has a filter size of 58mm whereas the Tamron 35mm F2.8 Di III OSD M1:2 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 58mm filters that we recommend you to consider for the Sigma 35mm F2 DG DN:
And these are the 67mm filters that we recommend for the Tamron 35mm F2.8 Di III OSD M1:2:
Lens Mounts
Both the Sigma 35mm F2 DG DN and the Tamron 35mm F2.8 Di III OSD M1:2 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Sigma 35mm F2 DG DN is also available in Leica L mount.
Focal Range
Both lenses have the same focal range of
35mm but while Sigma 35mm F2 DG DN has the fastest aperture of
F2.0, the Tamron 35mm F2.8 Di III OSD M1:2's widest aperture value is
F2.8.