The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 28-70mm F2.8 DG DN C 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. Canon RF 28-70mm F2L USM is the longer of the two lenses at 140mm. The Sigma 28-70mm F2.8 DG DN C with a length of 102mm, is 38mm shorter. Besides being longer, the Canon RF 28-70mm F2L USM also has a larger diameter of 104mm compared to the Sigma 28-70mm F2.8 DG DN C's 72mm diameter.
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Below you can find a scaled side-by-side image of Sigma 28-70mm F2.8 DG DN C and Canon RF 28-70mm F2L USM to get a better idea of how their sizes compare in real life.
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 28-70mm F2.8 DG DN C weighs 470g, which means it is 960g (67%) lighter than the Canon RF 28-70mm F2L USM which has a weight of 1430g.
Filter Threads
The Sigma 28-70mm F2.8 DG DN C has a filter size of 67mm 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 67mm filters that we recommend you to consider for the Sigma 28-70mm F2.8 DG DN C:
And these are the 95mm filters that we recommend for the Canon RF 28-70mm F2L USM:
Lens Mounts
The Sigma 28-70mm F2.8 DG DN C 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 A9 III, Sony A7C Mark II and Sony A7CR for the Sony E Mount and Canon R100, Canon R8 and Canon R50 for the Canon RF Mount.
Sigma 28-70mm F2.8 DG DN C is also available in Leica L mount.
Focal Range
Both lenses have the same focal range of
28-70mm but while Sigma 28-70mm F2.8 DG DN C has the fastest aperture of
F2.8, the Canon RF 28-70mm F2L USM's widest aperture value is
F2.