Irix 15mm f/2.4 Firefly Lens for Pentax K

The Irix 15mm f/2.4 Firefly is an ultra-wide lens built for landscape, night, and astrophotography shooters who need a fast, weather-sealed wide-angle. It suits photographers who work in extreme outdoor conditions and want a lens designed specifically around manual focus precision for night skies. This version mounts in Pentax K.

• 110° Field of View: An ultra-wide design captures a 110-degree field of view with minimal distortion (2%).
• 15 Elements in 11 Groups: Includes 4 refractive, 2 ED, and 3 aspherical elements for sharp images with smooth bokeh at f/2.4.
• "Infinity Click" for Night Photography: A tactile click at infinity focus makes astrophotography and night shooting fast and precise.
• Weather-Sealed, Internal Focus: A sealed body resists moisture, dust, and sand, and internal focusing keeps the lens length constant.
• 95mm Front Filter Thread: Accepts 95mm filters, including Irix's own ultra-slim Edge filters designed to avoid vignetting at this focal length.
• Detachable Hood with Filter Access Window: A detachable lens hood includes a sliding window to adjust CPL or variable ND filters without removing the hood.
• Electronic Iris with EXIF Data: An electronic module enables semi-automatic PASM exposure modes and EXIF data recording.