The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 10-18mm F2.8 DC DN C and the Tokina 10-17mm f3.5-4.5 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. Tokina 10-17mm f3.5-4.5 Fisheye is the longer of the two lenses at 71mm. The Sigma 10-18mm F2.8 DC DN C with a length of 64mm, is 7mm shorter. On the other hand, the Sigma 10-18mm F2.8 DC DN C has a larger diameter of 72mm compared to the Tokina 10-17mm f3.5-4.5 Fisheye's 70mm 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. Sigma 10-18mm F2.8 DC DN C weighs 255g, which means it is 95g (27%) lighter than the Tokina 10-17mm f3.5-4.5 Fisheye which has a weight of 350g.
Lens Mounts
The Sigma 10-18mm F2.8 DC DN C has the Canon RF lens mount whereas the Tokina 10-17mm f3.5-4.5 Fisheye has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R50 V, Canon R100 and Canon R50 for the Canon RF Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount.
Sigma 10-18mm F2.8 DC DN C is also available in the Sony E , Leica L and Fujifilm X mounts.
Tokina 10-17mm f3.5-4.5 Fisheye is also available in Nikon F (DX) mount.
Focal Range
Sigma 10-18mm F2.8 DC DN C has a focal range of 10-18mm and
1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
16-28.8mm when used on a APS-C / DX format camera.
On the other hand, the Tokina 10-17mm f3.5-4.5 Fisheye has a focal range of 10-17mm and 1.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 16-27.2mm when used on a APS-C / DX format camera.
