The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 28-70mm F2.8 and the Tamron 28-75mm F2.8 Di III 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 28-75mm F2.8 Di III is the longer of the two lenses at 118mm. The Canon RF 28-70mm F2.8 with a length of 92mm, is 26mm shorter. On the other hand, the Canon RF 28-70mm F2.8 has a larger diameter of 77mm compared to the Tamron 28-75mm F2.8 Di III's 76mm diameter.
Below you can find a scaled side-by-side image of Canon RF 28-70mm F2.8 and Tamron 28-75mm F2.8 Di III to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 28-70mm F2.8 and the Tamron 28-75mm F2.8 Di III 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. Canon RF 28-70mm F2.8 weighs 494g, which means it is 46g (8%) lighter than the Tamron 28-75mm F2.8 Di III which has a weight of 540g.
Filter Threads
Both the Canon RF 28-70mm F2.8 and the Tamron 28-75mm F2.8 Di III have the same Filter thread size of 67mm .
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Canon RF 28-70mm F2.8 has the Canon RF lens mount whereas the Tamron 28-75mm F2.8 Di III has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Canon R6 V , Canon R6 III and Canon C50 for the Canon RF Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Sony E and Nikon Z mounts.
Focal Range
Canon RF 28-70mm F2.8 has a focal range of 28-70mm and
2.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
44.8 - 112mm .
On the other hand, the Tamron 28-75mm F2.8 Di III has a focal range of 28-75mm and 2.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 112.5mm .
