Fast ultra-wide Irix 15mm f/2.4 for Canon EF, exceptional astrophotography lens with infinity focus click.
The Irix 15mm f/2.4 Firefly is a fast ultra-wide prime for Canon EF full-frame cameras, combining a genuinely wide 15mm perspective with an unusually fast f/2.4 aperture that excels for astrophotography and low-light wide-angle work. The Firefly version uses lighter materials for reduced weight versus the Blackstone variant.
The f/2.4 aperture at 15mm is remarkably fast for an ultra-wide lens, providing exceptional capability for night sky photography where wider apertures capture more starlight per exposure. The rectilinear design provides straight-line fidelity for architectural work, and the fast aperture enables creative depth-of-field control unusual at this focal length.
Build quality uses the Firefly's lighter construction to keep weight manageable while maintaining the same high-quality optical formula as the premium Blackstone. The lens features infinity click for precise astrophotography focusing and a rear gel filter slot for the bulbous front element.
The Irix 15mm f/2.4 Firefly offers outstanding astrophotography capability on the used market at competitive pricing. The fast f/2.4 aperture at ultra-wide 15mm provides a combination of speed and coverage that few alternatives can match for night sky and Milky Way photography.