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 Tamron 10-24mm F3.5-4.5 Di II VC HLD 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 Tamron 10-24mm F3.5-4.5 Di II VC HLD with a length of 85mm, is 33mm shorter. Besides being longer, the Irix 11mm F4 also has a larger diameter of 103mm compared to the Tamron 10-24mm F3.5-4.5 Di II VC HLD's 84mm diameter.
Below you can find a scaled side-by-side image of Irix 11mm F4 and Tamron 10-24mm F3.5-4.5 Di II VC HLD to get a better idea of how their sizes compare in real life.
Comparison image of the Irix 11mm F4 and the Tamron 10-24mm F3.5-4.5 Di II VC HLD 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. Tamron 10-24mm F3.5-4.5 Di II VC HLD weighs 440g, 44% (350g) lighter than the Irix 11mm F4's weight of 790g.
Lens Mounts
The Irix 11mm F4 has the Canon EF lens mount whereas the Tamron 10-24mm F3.5-4.5 Di II VC HLD has the Canon EF-S lens mount . Some of the latest released cameras that are compatible with these mounts are Blackmagic URSA 12K LF , Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount and Canon T8i , Canon 90D and Canon SL3 for the Canon EF-S Mount.
Irix 11mm F4 is also available in the Nikon F (FX) and Pentax KAF3 mounts.
Tamron 10-24mm F3.5-4.5 Di II VC HLD is also available in Nikon F (DX) mount.
Focal Range
Irix 11mm F4 is a prime lens with fixed focal lenght of 11mm.
On the other hand, the Tamron 10-24mm F3.5-4.5 Di II VC HLD has a focal range of 10-24mm and 2.4X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 16-38.4mm when used on a APS-C / DX format camera.