IRIX 11mm f/4 Firefly Lens for Nikon F Review

The IRIX 11mm f/4 Firefly is a budget-friendly manual-focus ultra-wide-angle lens designed for Nikon F-mount full-frame cameras. At $335, it sits in the entry tier of rectilinear ultra-wides, offering an ambitious spec sheet that includes three aspherical elements, two ED elements, four high-refractive-index elements, and a proprietary Neutrino coating to reduce flare and ghosting. The weather-sealed ABS plastic housing keeps weight down while the rubberized focus ring and built-in focus lock aim to make manual operation more manageable in the field.

IRIX positions this as a landscape and architecture lens for shooters who want extreme width without the price tag of Nikon's own glass or premium third-party alternatives. The nine-blade aperture and rectilinear design promise minimal distortion for an 11mm, while depth of field and distance scales cater to zone-focusing workflows. Build quality relies on reinforced plastic rather than metal, a trade-off typical of the Firefly line. For Nikon users seeking a cost-effective ultra-wide with respectable optics and manual-focus discipline, the Firefly presents a practical entry point into the focal length.