Irix 11mm f/4 Review

March 28, 2017 | Mark Goldstein |

Irix 11mm f/4 Specifications

Image size 35mm ”Full Frame”
Focal length 11mm
Field of View 126⁰ (diagonal)
Focusing range 0.28 m (0.92 ft) - ∞
Focusing type manual with lock function
Aperture range f/4.0 – f/22
Aperture control via camera
Aperture shape 9 rounded blades
Lens construction 16 elements in 10 groups (4x HR, 3x ASP, 2x ED)
Front filter thread N/A
Rear gelatin filter slot 30 x 30 mm
Available bayonet mounts Canon EF, Nikon F, Pentax K
Weight Firefly Canon 785 g (1.73 lbs)
Nikon 723 g (1.59 lbs)
Blackstone Canon 815 g (1.80 lbs)
Nikon 792 g (1.74 lbs)
Dimensions (D x H) Firefly Canon 103 x 118 mm (4.06” x 4.64”)
Nikon 103 x 115 mm (4.06” x 4.53”)
Blackstone Canon 103 x 118 mm (4.06” x 4.64”)
Nikon 103 x 115 mm (4.06” x 4.53”)