The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 35mm F1.2 II and the Tamron 20-40mm F2.8 VXD 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 F1.2 II is the longer of the two lenses at 113mm. The Tamron 20-40mm F2.8 VXD with a length of 86mm, is 27mm shorter. Besides being longer, the Sigma 35mm F1.2 II also has a larger diameter of 81mm compared to the Tamron 20-40mm F2.8 VXD's 74mm diameter.
Below you can find a scaled side-by-side image of Sigma 35mm F1.2 II and Tamron 20-40mm F2.8 VXD to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 35mm F1.2 II and the Tamron 20-40mm F2.8 VXD 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 20-40mm F2.8 VXD weighs 365g, 51% (385g) lighter than the Sigma 35mm F1.2 II's weight of 750g.
Filter Threads
The Sigma 35mm F1.2 II has a filter size of 72mm whereas the Tamron 20-40mm F2.8 VXD 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 72mm filters that we recommend you to consider for the Sigma 35mm F1.2 II:
And these are the 67mm filters that we recommend for the Tamron 20-40mm F2.8 VXD:
Lens Mounts
Both the Sigma 35mm F1.2 II and the Tamron 20-40mm F2.8 VXD 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 .
Focal Range
Sigma 35mm F1.2 II is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
52.5mm .
On the other hand, the Tamron 20-40mm F2.8 VXD has a focal range of 20-40mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 30 - 60mm .
