The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Leica SL 100-400 f5-6.3 and the Sigma 100-400mm F5-6.3 OS 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 100-400 f5-6.3 is the longer of the two lenses at 198mm. The Sigma 100-400mm F5-6.3 OS with a length of 197mm, is 1mm shorter. Besides being longer, the Leica SL 100-400 f5-6.3 also has a larger diameter of 88mm compared to the Sigma 100-400mm F5-6.3 OS's 86mm diameter.
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Below you can find a scaled side-by-side image of Leica SL 100-400 f5-6.3 and Sigma 100-400mm F5-6.3 OS 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 100-400mm F5-6.3 OS weighs 1135g, 25% (395g) lighter than the Leica SL 100-400 f5-6.3's weight of 1530g.
Below you can find the dimension and weight table of the Telephoto Zoom Lenses in Leica L Mount for size comparison purposes.
Super Telephoto Lenses in Leica L Mount for Size Comparison
Filter Threads
The Leica SL 100-400 f5-6.3 has a filter size of 82mm whereas the Sigma 100-400mm F5-6.3 OS has a 67mm 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 Leica SL 100-400 f5-6.3:
And these are the 67mm filters that we recommend for the Sigma 100-400mm F5-6.3 OS:
Lens Mounts
Both the Leica SL 100-400 f5-6.3 and the Sigma 100-400mm F5-6.3 OS has the same Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Leica SL3, Panasonic S5 II and Panasonic S5 II X.
Sigma 100-400mm F5-6.3 OS is also available in Sony E and Fujifilm X mounts.
Focal Range
Both lenses have the same focal range of
100-400mm and the fastest aperture of
F5-6.3.