The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 10-22mm f3.5-4.5 USM and the Canon 15mm f2.8 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 10-22mm f3.5-4.5 USM is the longer of the two lenses at 90mm. The Canon 15mm f2.8 Fisheye with a length of 62mm, is 28mm shorter. Besides being longer, the Canon 10-22mm f3.5-4.5 USM also has a larger diameter of 84mm compared to the Canon 15mm f2.8 Fisheye's 73mm 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. Canon 15mm f2.8 Fisheye weighs 330g, 14% (55g) lighter than the Canon 10-22mm f3.5-4.5 USM's weight of 385g.
Lens Mounts
The Canon 10-22mm f3.5-4.5 USM has the Canon EF-S lens mount whereas the Canon 15mm f2.8 Fisheye has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon T8i, Canon 90D and Canon SL3 for the Canon EF-S Mount and Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Focal Range
Canon 10-22mm f3.5-4.5 USM has a focal range of 10-22mm and
2.2X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
16-35.2mm when used on a APS-C / DX format camera.
On the other hand, the Canon 15mm f2.8 Fisheye is a prime lens with fixed focal lenght of 15mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 24mm.
