The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 28-45mm F1.8 and the Canon RF 28-70mm F2L 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. Sigma 28-45mm F1.8 is the longer of the two lenses at 151mm. The Canon RF 28-70mm F2L USM with a length of 140mm, is 11mm shorter. On the other hand, the Canon RF 28-70mm F2L USM has a larger diameter of 104mm compared to the Sigma 28-45mm F1.8's 88mm diameter.
Below you can find a scaled side-by-side image of Sigma 28-45mm F1.8 and Canon RF 28-70mm F2L USM to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 28-45mm F1.8 and the Canon RF 28-70mm F2L USM 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. Sigma 28-45mm F1.8 weighs 960g, which means it is 470g (32%) lighter than the Canon RF 28-70mm F2L USM which has a weight of 1430g.
Filter Threads
The Sigma 28-45mm F1.8 has a filter size of 82mm whereas the Canon RF 28-70mm F2L USM has a 95mm 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 28-45mm F1.8:
And these are the 95mm filters that we recommend for the Canon RF 28-70mm F2L USM:
Lens Mounts
The Sigma 28-45mm F1.8 has the Sony E lens mount whereas the Canon RF 28-70mm F2L USM 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
Sigma 28-45mm F1.8 has a focal range of 28-45mm and
1.6X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
42 - 67.5mm .
On the other hand, the Canon RF 28-70mm F2L USM 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 .
