The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 100-400mm f4.5-5.6L IS II USM and the Samsung 10mm F3.5 Fisheye 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. Canon 100-400mm f4.5-5.6L IS II USM is the longer of the two lenses at 193mm. The Samsung 10mm F3.5 Fisheye with a length of 26mm, is 167mm shorter. Besides being longer, the Canon 100-400mm f4.5-5.6L IS II USM also has a larger diameter of 94mm compared to the Samsung 10mm F3.5 Fisheye's 59mm 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. Samsung 10mm F3.5 Fisheye weighs 71g, 95% (1519g) lighter than the Canon 100-400mm f4.5-5.6L IS II USM's weight of 1590g.
Lens Mounts
The Canon 100-400mm f4.5-5.6L IS II USM has the Canon EF lens mount whereas the Samsung 10mm F3.5 Fisheye has the Samsung NX lens mount. Some of the latest released cameras that are compatible with these mounts are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount and Samsung NX1, Samsung NX3000 and Samsung NX30 for the Samsung NX Mount.
Focal Range
Canon 100-400mm f4.5-5.6L IS II USM has a focal range of 100-400mm and
4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
160 - 640mm.
On the other hand, the Samsung 10mm F3.5 Fisheye is a prime lens with fixed focal lenght of 10mm which has an effective (full-frame 35mm equivalent) focal range of 15mm when used on a APS-C / DX format camera.