The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Irix 11mm F4 and the Canon 24mm F2.8 STM 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. Irix 11mm F4 is the longer of the two lenses at 118mm. The Canon 24mm F2.8 STM with a length of 23mm, is 95mm shorter. Besides being longer, the Irix 11mm F4 also has a larger diameter of 103mm compared to the Canon 24mm F2.8 STM's 68mm diameter.
Below you can find a scaled side-by-side image of Irix 11mm F4 and Canon 24mm F2.8 STM to get a better idea of how their sizes compare in real life.
Comparison image of the Irix 11mm F4 and the Canon 24mm F2.8 STM Size and Weight 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 24mm F2.8 STM weighs 125g, 84% (665g) lighter than the Irix 11mm F4's weight of 790g.
Lens Mounts
The Irix 11mm F4 has the Pentax KAF3 lens mount whereas the Canon 24mm F2.8 STM has the Canon EF-S lens mount . Some of the latest released cameras that are compatible with these mounts are Pentax K-3 III Mono , Pentax KF and Pentax K-3 III for the Pentax KAF3 Mount and Canon T8i , Canon 90D and Canon SL3 for the Canon EF-S Mount.
Canon EF and Nikon F (FX) mounts.
Focal Range
Irix 11mm F4 is a prime lens with fixed focal lenght of 11mm.
On the other hand, the Canon 24mm F2.8 STM is a prime lens with fixed focal lenght of 24mm which has an effective (full-frame 35mm equivalent) focal range of 38.4mm when used on a APS-C / DX format camera.
