The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 20-35mm f3.5-4.5 USM and the Canon 8-15mm f4L Fisheye USM 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 8-15mm f4L Fisheye USM is the longer of the two lenses at 83mm. The Canon 20-35mm f3.5-4.5 USM with a length of 69mm, is 14mm shorter. On the other hand, the Canon 20-35mm f3.5-4.5 USM has a larger diameter of 84mm compared to the Canon 8-15mm f4L Fisheye USM's 79mm 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 20-35mm f3.5-4.5 USM weighs 340g, which means it is 200g (37%) lighter than the Canon 8-15mm f4L Fisheye USM which has a weight of 540g.
Below you can find the dimension and weight table of the Wideangle Zoom Lenses in Canon EF Mount for size comparison purposes.
Ultra-Wideangle Lenses in Canon EF Mount for Size Comparison
Lens Mounts
Both the Canon 20-35mm f3.5-4.5 USM and the Canon 8-15mm f4L Fisheye USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K.
Focal Range
Canon 20-35mm f3.5-4.5 USM has a focal range of 20-35mm and
1.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
32 - 56mm.
On the other hand, the 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 a 35mm (FF) equivalent of 12.8 - 24mm.
