The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 14-24mm F2.8 and the Sigma 10-18mm F2.8 DC DN C 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. Samyang 14-24mm F2.8 is the longer of the two lenses at 89mm. The Sigma 10-18mm F2.8 DC DN C with a length of 64mm, is 25mm shorter. Besides being longer, the Samyang 14-24mm F2.8 also has a larger diameter of 84mm compared to the Sigma 10-18mm F2.8 DC DN C's 72mm diameter.
Below you can find a scaled side-by-side image of Samyang 14-24mm F2.8 and Sigma 10-18mm F2.8 DC DN C to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang 14-24mm F2.8 and the Sigma 10-18mm F2.8 DC DN C 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 10-18mm F2.8 DC DN C weighs 260g, 41% (185g) lighter than the Samyang 14-24mm F2.8's weight of 445g.
Below you can find the dimension and weight table of the Wideangle Zoom Lenses in Leica L Mount for size comparison purposes.
Ultra-Wideangle Lenses in Leica L Mount for Size Comparison
Filter Threads
The Samyang 14-24mm F2.8 has a filter size of 77mm whereas the Sigma 10-18mm F2.8 DC DN C 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 77mm filters that we recommend you to consider for the Samyang 14-24mm F2.8:
And these are the 67mm filters that we recommend for the Sigma 10-18mm F2.8 DC DN C:
Lens Mounts
Both the Samyang 14-24mm F2.8 and the Sigma 10-18mm F2.8 DC DN C has the same Leica L lens mount . Some of the latest released cameras that are compatible with the Leica L lenses are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE .
Samyang 14-24mm F2.8 is also available in the Sony E mount.
Sigma 10-18mm F2.8 DC DN C is also available in Sony E , Fujifilm X and Canon RF mounts.
Focal Range
Samyang 14-24mm F2.8 has a focal range of 14-24mm and
1.7X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
21 - 36mm .
On the other hand, the Sigma 10-18mm F2.8 DC DN C has a focal range of 10-18mm and 1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 15-27mm when used on a APS-C / DX format camera.