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 Nikon AF-P DX 10-20mm F4.5-5.6G VR 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 Nikon AF-P DX 10-20mm F4.5-5.6G VR with a length of 73mm, is 45mm shorter. Besides being longer, the Irix 11mm F4 also has a larger diameter of 103mm compared to the Nikon AF-P DX 10-20mm F4.5-5.6G VR's 77mm diameter.
Below you can find a scaled side-by-side image of Irix 11mm F4 and Nikon AF-P DX 10-20mm F4.5-5.6G VR to get a better idea of how their sizes compare in real life.
Comparison image of the Irix 11mm F4 and the Nikon AF-P DX 10-20mm F4.5-5.6G VR 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. Nikon AF-P DX 10-20mm F4.5-5.6G VR weighs 230g, 70% (560g) lighter than the Irix 11mm F4's weight of 790g.
Lens Mounts
The Irix 11mm F4 has the Nikon F (FX) lens mount whereas the Nikon AF-P DX 10-20mm F4.5-5.6G VR has the Nikon F (DX) lens mount . Some of the latest released cameras that are compatible with these mounts are Nikon D6 , Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount and Nikon D3500 , Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount.
Irix 11mm F4 is also available in the Canon EF and Pentax KAF3 mounts.
Focal Range
Irix 11mm F4 is a prime lens with fixed focal lenght of 11mm.
On the other hand, the Nikon AF-P DX 10-20mm F4.5-5.6G VR has a focal range of 10-20mm and 2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 15-30mm when used on a APS-C / DX format camera.