The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 17-40mm f1.8 and the Leica SL 24-70mm F2.8 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. Leica SL 24-70mm F2.8 is the longer of the two lenses at 123mm. The Sigma 17-40mm f1.8 with a length of 116mm, is 7mm shorter. Besides being longer, the Leica SL 24-70mm F2.8 also has a larger diameter of 88mm compared to the Sigma 17-40mm f1.8's 73mm diameter.
Below you can find a scaled side-by-side image of Sigma 17-40mm f1.8 and Leica SL 24-70mm F2.8 to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 17-40mm f1.8 and the Leica SL 24-70mm F2.8 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 17-40mm f1.8 weighs 535g, which means it is 321g (37%) lighter than the Leica SL 24-70mm F2.8 which has a weight of 856g.
Below you can find the dimension and weight table of the Standard Zoom Lenses in Leica L Mount for size comparison purposes.
Standard Leica L Mount
Filter Threads
The Sigma 17-40mm f1.8 has a filter size of 67mm whereas the Leica SL 24-70mm F2.8 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 Sigma 17-40mm f1.8:
And these are the 82mm filters that we recommend for the Leica SL 24-70mm F2.8:
Lens Mounts
Both the Sigma 17-40mm f1.8 and the Leica SL 24-70mm F2.8 has the same Leica L lens mount . Some of the latest released cameras that are compatible with the Leica L lenses are Leica TL2 , Leica TL and Leica T Typ 701 .
Sony E , Fujifilm X and Canon RF mounts.
Focal Range
Sigma 17-40mm f1.8 has a focal range of 17-40mm and
2.4X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
25.5-60mm when used on a APS-C / DX format camera.
On the other hand, the Leica SL 24-70mm F2.8 has a focal range of 24-70mm and 2.9X zoom ratio .
