The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 16mm f2.0 and the Canon 8-15mm f4L Fisheye USM for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Samyang 16mm f2.0 is the longer of the two lenses at 89mm. The Canon 8-15mm f4L Fisheye USM with a length of 83mm is 6mm shorter. Besides being longer, the Samyang 16mm f2.0 also has a larger diameter of 83mm compared to Canon 8-15mm f4L Fisheye USM's 79mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Canon 8-15mm f4L Fisheye USM weighs 540g, 7% (43g) lighter than the Samyang 16mm f2.0's weight of 583g.
Both Samyang 16mm f2.0 has the Fujifilm X lens mount whereas the Canon 8-15mm f4L Fisheye USM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T5, Fujifilm X-H2 and Fujifilm X-H2S for the Fujifilm X Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Samyang 16mm f2.0 is also available in Canon EF , Canon EF-M, Nikon F (DX), Four Thirds, Micro Four Thirds, Pentax KAF, Sony Alpha, Sony E and Samsung NX mounts.
Samyang 16mm f2.0 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. Canon 8-15mm f4L Fisheye USM has a focal range of 8-15mm and 1.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 12.8 - 24mm.