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 SP 15-30mm F2.8 Di VC USD G2 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. Tamron SP 15-30mm F2.8 Di VC USD G2 is the longer of the two lenses at 145mm. The Irix 11mm F4 with a length of 118mm, is 27mm shorter. On the other hand, the Irix 11mm F4 has a larger diameter of 103mm compared to the Tamron SP 15-30mm F2.8 Di VC USD G2's 98mm 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. Irix 11mm F4 weighs 790g, which means it is 320g (28%) lighter than the Tamron SP 15-30mm F2.8 Di VC USD G2 which has a weight of 1110g.
Lens Mounts
Both the Irix 11mm F4 and the Tamron SP 15-30mm F2.8 Di VC USD G2 has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Irix 11mm F4 is also available in the Canon EF and Pentax KAF3 mounts.
Tamron SP 15-30mm F2.8 Di VC USD G2 is also available in Canon EF mount.
Focal Range
Irix 11mm F4 is a prime lens with fixed focal lenght of 11mm.
On the other hand, the Tamron SP 15-30mm F2.8 Di VC USD G2 has a focal range of 15-30mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 22.5 - 45mm.
