The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 14-35mm F4L IS USM and the Irix 45mm F1.4 for their suitability to various photography scenarios:
Size and Weight Comparison
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 14-35mm F4L IS USM weighs 540g, which means it is 385g (41%) lighter than the Irix 45mm F1.4 which has a weight of 925g.
Filter Threads
Both the Canon RF 14-35mm F4L IS USM and the Irix 45mm F1.4 have the same Filter thread size of 77mm.
Below are links to the 77mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Canon RF 14-35mm F4L IS USM has the Canon RF lens mount whereas the Irix 45mm F1.4 has the Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount.
Irix 45mm F1.4 is also available in Canon EF and Pentax KAF2 mounts.
Focal Range
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.
On the other hand, the Irix 45mm F1.4 is a prime lens with fixed focal lenght of 45mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 67.5mm.
