The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 15mm f1.4 DC C and the Canon RF-S 14-30mm F4-6.3 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. Sigma 15mm f1.4 DC C is the longer of the two lenses at 63mm. The Canon RF-S 14-30mm F4-6.3 with a length of 62mm, is 1mm shorter. On the other hand, the Canon RF-S 14-30mm F4-6.3 has a larger diameter of 70mm compared to the Sigma 15mm f1.4 DC C's 69mm 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 RF-S 14-30mm F4-6.3 weighs 181g, 24% (59g) lighter than the Sigma 15mm f1.4 DC C's weight of 240g.
Filter Threads
Both the Sigma 15mm f1.4 DC C and the Canon RF-S 14-30mm F4-6.3 have the same Filter thread size of 58mm.
Below are links to the 58mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 15mm f1.4 DC C and the Canon RF-S 14-30mm F4-6.3 has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are Canon R50 V, Canon R100 and Canon R50.
Sigma 15mm f1.4 DC C is also available in the Fujifilm X and Sony E mounts.
Focal Range
Sigma 15mm f1.4 DC C is a prime lens with fixed focal lenght of 15mm which has an effective (full-frame 35mm equivalent) focal range of
24mm when used on a APS-C / DX format camera.
On the other hand, the Canon RF-S 14-30mm F4-6.3 has a focal range of 14-30mm and 2.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 22.4-48mm when used on a APS-C / DX format camera.
