The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica SL 28-70mm f2.8 and the Sigma 24-70mm F2.8 II 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 24-70mm F2.8 II is the longer of the two lenses at 122mm. The Leica SL 28-70mm f2.8 with a length of 102mm, is 20mm shorter. Besides being longer, the Sigma 24-70mm F2.8 II also has a larger diameter of 88mm compared to the Leica SL 28-70mm f2.8's 73mm diameter.
Below you can find a scaled side-by-side image of Leica SL 28-70mm f2.8 and Sigma 24-70mm F2.8 II to get a better idea of how their sizes compare in real life.
Comparison image of the Leica SL 28-70mm f2.8 and the Sigma 24-70mm F2.8 II 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. Leica SL 28-70mm f2.8 weighs 572g, which means it is 163g (22%) lighter than the Sigma 24-70mm F2.8 II which has a weight of 735g.
Filter Threads
The Leica SL 28-70mm f2.8 has a filter size of 67mm whereas the Sigma 24-70mm F2.8 II has a 82mm 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 Leica SL 28-70mm f2.8:
And these are the 82mm filters that we recommend for the Sigma 24-70mm F2.8 II:
Lens Mounts
The Leica SL 28-70mm f2.8 has the Leica L lens mount whereas the Sigma 24-70mm F2.8 II has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Leica L mount.
Focal Range
Leica SL 28-70mm f2.8 has a focal range of 28-70mm and
2.5X zoom ratio .
On the other hand, the Sigma 24-70mm F2.8 II has a focal range of 24-70mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 36 - 105mm .
