IRIX 21mm f/1.4 Dragonfly Lens for Nikon F Review

The IRIX 21mm f/1.4 Dragonfly is a manual-focus ultra-wide prime built for Nikon F-mount full-frame cameras. At 21mm with an f/1.4 maximum aperture, it occupies a niche for wide astrophotography, nightscapes, and environmental portraiture where speed and field of view matter more than autofocus convenience. The optical formula leans heavily on correction elements, with two aspherical elements and four ultra-low dispersion glass pieces designed to control distortion and chromatic aberration across the frame.

Build quality aims high for the price, with a weather-sealed magnesium alloy housing, tactile depth-of-field and focus distance scales, and UV-reactive engravings for low-light work. The eleven-blade diaphragm should produce smooth bokeh when shooting wide open, though the ultra-wide focal length limits background separation. At $420, it undercuts many autofocus rivals while offering a rare combination of speed and coverage in manual form, making it a credible option for shooters who prioritize aperture and build over electronic conveniences.