The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 28-75mm F2.8 Di III and the Canon 24-70mm f2.8L USM 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. Canon 24-70mm f2.8L USM is the longer of the two lenses at 124mm. The Tamron 28-75mm F2.8 Di III with a length of 118mm, is 6mm shorter. Besides being longer, the Canon 24-70mm f2.8L USM also has a larger diameter of 83mm compared to the Tamron 28-75mm F2.8 Di III's 76mm 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 28-75mm F2.8 Di III weighs 540g, which means it is 410g (43%) lighter than the Canon 24-70mm f2.8L USM which has a weight of 950g.
Filter Threads
The Tamron 28-75mm F2.8 Di III has a filter size of 67mm whereas the Canon 24-70mm f2.8L USM has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 28-75mm F2.8 Di III:
And these are the 77mm filters that we recommend for the Canon 24-70mm f2.8L USM:
Lens Mounts
The Tamron 28-75mm F2.8 Di III has the Sony E lens mount whereas the Canon 24-70mm f2.8L USM has the Canon EF 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 Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Tamron 28-75mm F2.8 Di III is also available in the Sony E and Nikon Z mounts.
Focal Range
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.
On the other hand, the Canon 24-70mm f2.8L USM has a focal range of 24-70mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 38.4 - 112mm.
