The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Viltrox 9mm F2.8 Z and the Irix 11mm F4 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 Viltrox 9mm F2.8 Z with a length of 56mm, is 62mm shorter. Besides being longer, the Irix 11mm F4 also has a larger diameter of 103mm compared to the Viltrox 9mm F2.8 Z's 65mm diameter.
Below you can find a scaled side-by-side image of Viltrox 9mm F2.8 Z and Irix 11mm F4 to get a better idea of how their sizes compare in real life.
Comparison image of the Viltrox 9mm F2.8 Z and the Irix 11mm F4 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. Viltrox 9mm F2.8 Z weighs 175g, which means it is 615g (77%) lighter than the Irix 11mm F4 which has a weight of 790g.
Lens Mounts
The Viltrox 9mm F2.8 Z has the Nikon Z lens mount whereas the Irix 11mm F4 has the Pentax KAF3 lens mount . Some of the latest released cameras that are compatible with these mounts are RED Komodo-X 6K Z , Nikon Z50 II and Nikon Z30 for the Nikon Z Mount and Pentax K-3 III Mono , Pentax KF and Pentax K-3 III for the Pentax KAF3 Mount.
Canon EF and Nikon F (FX) mounts.
Focal Range
Viltrox 9mm F2.8 Z is a prime lens with fixed focal lenght of 9mm which has an effective (full-frame 35mm equivalent) focal range of
13.5mm when used on a APS-C / DX format camera.
On the other hand, the Irix 11mm F4 is a prime lens with fixed focal lenght of 11mm.
