The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 12-20mm f2.8 and the Canon RF 10-20mm F4 L IS STM 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 12-20mm f2.8 is the longer of the two lenses at 119mm. The Canon RF 10-20mm F4 L IS STM with a length of 112mm, is 7mm shorter. Besides being longer, the Tamron 12-20mm f2.8 also has a larger diameter of 90mm compared to the Canon RF 10-20mm F4 L IS STM's 84mm diameter.
Below you can find a scaled side-by-side image of Tamron 12-20mm f2.8 and Canon RF 10-20mm F4 L IS STM to get a better idea of how their sizes compare in real life.
Comparison image of the Tamron 12-20mm f2.8 and the Canon RF 10-20mm F4 L IS STM 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.
Lens Mounts
The Tamron 12-20mm f2.8 has the Sony E lens mount whereas the Canon RF 10-20mm F4 L IS STM has the Canon RF lens mount . Some of the latest released cameras that are compatible with these mounts are Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount and Canon R6 V , Canon R6 III and Canon C50 for the Canon RF Mount.
Focal Range
Tamron 12-20mm f2.8 has a focal range of 12-20mm and
1.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
18 - 30mm .
On the other hand, the Canon RF 10-20mm F4 L IS STM has a focal range of 10-20mm 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 15 - 30mm .
