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 28-70mm 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. Sigma 17-40mm f1.8 is the longer of the two lenses at 116mm. The Leica SL 28-70mm f2.8 with a length of 102mm, is 14mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 73mm.
Below you can find a scaled side-by-side image of Sigma 17-40mm f1.8 and Leica SL 28-70mm 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 28-70mm 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 37g (6%) lighter than the Leica SL 28-70mm f2.8 which has a weight of 572g.
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
Both the Sigma 17-40mm f1.8 and the Leica SL 28-70mm f2.8 have the same Filter thread size of 67mm .
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 17-40mm f1.8 and the Leica SL 28-70mm 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 28-70mm f2.8 has a focal range of 28-70mm and 2.5X zoom ratio .
