The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 12mm f1.4 and the Canon RF 14-35mm F4L IS 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 RF 14-35mm F4L IS USM is the longer of the two lenses at 100mm. The Sigma 12mm f1.4 with a length of 67mm, is 33mm shorter. Besides being longer, the Canon RF 14-35mm F4L IS USM also has a larger diameter of 84mm compared to the Sigma 12mm f1.4'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. Sigma 12mm f1.4 weighs 250g, which means it is 290g (53%) lighter than the Canon RF 14-35mm F4L IS USM which has a weight of 540g.
Filter Threads
The Sigma 12mm f1.4 has a filter size of 62mm whereas the Canon RF 14-35mm F4L IS USM has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sigma 12mm f1.4:
And these are the 77mm filters that we recommend for the Canon RF 14-35mm F4L IS USM:
Lens Mounts
Both the Sigma 12mm f1.4 and the Canon RF 14-35mm F4L IS USM has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are RED Komodo-X 6K, RED Komodo 6K and Canon EOS C70.
Sigma 12mm f1.4 is also available in the Sony E and Fujifilm X mounts.
Focal Range
Sigma 12mm f1.4 is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of
18mm when used on a APS-C / DX format camera.
On the other hand, the Canon RF 14-35mm F4L IS USM has a focal range of 14-35mm and 2.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 22.4 - 56mm.
