The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 16mm F1.4 DC DN L and the Samyang 20mm F1.8 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 16mm F1.4 DC DN L is the longer of the two lenses at 92mm. The Samyang 20mm F1.8 with a length of 88mm, is 4mm shorter. On the other hand, the Samyang 20mm F1.8 has a larger diameter of 83mm compared to the Sigma 16mm F1.4 DC DN L's 72mm diameter.
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 16mm F1.4 DC DN L weighs 405g, which means it is 92g (18%) lighter than the Samyang 20mm F1.8 which has a weight of 497g.
Filter Threads
The Sigma 16mm F1.4 DC DN L has a filter size of 67mm whereas the Samyang 20mm F1.8 has a 77mm 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 16mm F1.4 DC DN L:
And these are the 77mm filters that we recommend for the Samyang 20mm F1.8:
Lens Mounts
The Sigma 16mm F1.4 DC DN L has the Leica L lens mount whereas the Samyang 20mm F1.8 has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Leica TL2, Leica TL and Leica T Typ 701 for the Leica L Mount and Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount.
Samyang 20mm F1.8 is also available in Canon EF , Canon EF-M, Fujifilm X, Micro Four Thirds, Nikon F (FX), Pentax KAF, Samsung NX and Sony Alpha mounts.
Focal Range
Sigma 16mm F1.4 DC DN L is a prime lens with fixed focal lenght of 16mm which has an effective (full-frame 35mm equivalent) focal range of
24mm when used on a APS-C / DX format camera.
On the other hand, the Samyang 20mm F1.8 is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 30mm.
