The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 21mm F1.4 ED AS UMC CS and the Sigma 24-70 F2.8 DG DN Art 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 24-70 F2.8 DG DN Art is the longer of the two lenses at 123mm. The Samyang 21mm F1.4 ED AS UMC CS with a length of 68mm, is 55mm shorter. Besides being longer, the Sigma 24-70 F2.8 DG DN Art also has a larger diameter of 88mm compared to the Samyang 21mm F1.4 ED AS UMC CS's 64mm diameter.
Below you can find a scaled side-by-side image of Samyang 21mm F1.4 ED AS UMC CS and Sigma 24-70 F2.8 DG DN Art to get a better idea of how their sizes compare in real life.
Comparison image of the Samyang 21mm F1.4 ED AS UMC CS and the Sigma 24-70 F2.8 DG DN Art 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. Samyang 21mm F1.4 ED AS UMC CS weighs 275g, which means it is 560g (67%) lighter than the Sigma 24-70 F2.8 DG DN Art which has a weight of 835g.
Filter Threads
The Samyang 21mm F1.4 ED AS UMC CS has a filter size of 58mm whereas the Sigma 24-70 F2.8 DG DN Art 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 58mm filters that we recommend you to consider for the Samyang 21mm F1.4 ED AS UMC CS:
And these are the 82mm filters that we recommend for the Sigma 24-70 F2.8 DG DN Art:
Lens Mounts
The Samyang 21mm F1.4 ED AS UMC CS has the Fujifilm X lens mount whereas the Sigma 24-70 F2.8 DG DN Art has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III , Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Canon EF-M , Micro Four Thirds and Sony E mounts.
Leica L mount.
Focal Range
Samyang 21mm F1.4 ED AS UMC CS is a prime lens with fixed focal lenght of 21mm which has an effective (full-frame 35mm equivalent) focal range of
31.5mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 24-70 F2.8 DG DN Art has a focal range of 24-70mm and 2.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 36 - 105mm .
