The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 135mm F1.8 DG HSM and the Tamron 70-180mm F2.8 Di 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. Tamron 70-180mm F2.8 Di is the longer of the two lenses at 149mm. The Sigma 135mm F1.8 DG HSM with a length of 141mm, is 8mm shorter. On the other hand, the Sigma 135mm F1.8 DG HSM has a larger diameter of 91mm compared to the Tamron 70-180mm F2.8 Di's 81mm diameter.
Below you can find a scaled side-by-side image of Sigma 135mm F1.8 DG HSM and Tamron 70-180mm F2.8 Di to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 135mm F1.8 DG HSM and the Tamron 70-180mm F2.8 Di Size and Weight 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 70-180mm F2.8 Di weighs 815g, 27% (315g) lighter than the Sigma 135mm F1.8 DG HSM's weight of 1130g.
Filter Threads
The Sigma 135mm F1.8 DG HSM has a filter size of 82mm whereas the Tamron 70-180mm F2.8 Di 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 82mm filters that we recommend you to consider for the Sigma 135mm F1.8 DG HSM:
And these are the 67mm filters that we recommend for the Tamron 70-180mm F2.8 Di:
Lens Mounts
Both the Sigma 135mm F1.8 DG HSM and the Tamron 70-180mm F2.8 Di 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 SA , Nikon F (FX) and Canon EF mounts.
Focal Range
Sigma 135mm F1.8 DG HSM is a prime lens with fixed focal lenght of 135mm.
On the other hand, the Tamron 70-180mm F2.8 Di has a focal range of 70-180mm and 2.6X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 105 - 270mm .
