Irix 11mm f/4 Firefly Ultra-Wide Prime Lens for Canon EF

Capturing vast landscapes, architectural interiors, and dramatic astrophotography scenes demands an ultra-wide perspective without compromising on sharpness or portability. The Irix 11mm f/4 Firefly lens for Canon EF mounts delivers an expansive 126° diagonal angle of view, enabling photographers to frame sweeping vistas and tight spaces with ease. Its lightweight composite construction makes it an ideal companion for travel and outdoor shoots, while the manual focus design with focus lock and infinity click ensures precise control for critical focusing.

Who is it for

This lens is perfect for landscape, architecture, and astrophotography enthusiasts who need an ultra-wide prime with full-frame coverage. It suits photographers who prefer manual focus for deliberate composition and value a lightweight, weather-sealed build for shooting in challenging conditions.

Main features

• Ultra-wide 11mm focal length with a bright f/4 maximum aperture for low-light performance.
• Full-frame coverage with Canon EF mount for compatibility with a wide range of DSLRs.
• Advanced optical design: 16 elements in 10 groups, including 4 high-refractive and 3 low-dispersion elements, to minimize distortion and chromatic aberration.
• 9 rounded diaphragm blades for smooth, pleasing bokeh.
• Manual focus with focus lock, infinity click, and hyperfocal scale for precise control.
• Weather-sealed construction with 3 seals to protect against dust and moisture.
• Rear gel filter slot (30 x 30 mm) for creative filtration without bulky front filters.

Specifications

• Focal length: 11mm
• Maximum aperture: f/4
• Minimum aperture: f/22
• Lens mount: Canon EF
• Format compatibility: Full-frame
• Angle of view: 126° diagonal
• Minimum focus distance: 0.27 m
• Optical design: 16 elements in 10 groups
• Diaphragm blades: 9 (rounded)
• Focus type: Manual focus only
• Filter size: Rear gel filter slot (30 x 30 mm)
• Weather sealing: Yes (3 seals)
• Focus lock: Yes
• Infinity click: Yes
• Hyperfocal scale: Yes
• Construction: Lightweight composite (Firefly series)
• Image stabilization: No

Tips

For astrophotography, use the infinity click to quickly set focus at infinity, and employ the hyperfocal scale for maximum depth of field in landscape shots. The rear gel filter slot allows creative filtration without affecting the wide angle of view.