IRIX 11mm f/4

Irix 11mm f/4 Firefly

Lens Summary

Brand: Irix

Also Known As: IRIX 11mm f/4

Lens Type: Prime Lens

Format: Full Frame / FX

Focus: Manual Focus

Lens Mount: Canon EF, Nikon F, Pentax K

Release Date: 2017-03-02

MSRP Price: $$574.95 for Firefly ($774.95 for Blackstone)

Made in: South Korea

Production Status: In Production

Manufacturer Link: Product Page

Lens Description: A versatile ultra-wide prime lens, the IRIX 11mm f/4 balances a sophisticated optical design with a lightweight, durable physical construction. Aspherical, extra-low dispersion, and high-refractive index elements are used to suppress color fringing, chromatic and spherical aberrations, as well as unwanted distortion, and also contribute to producing a high degree of sharpness and clarity. Additionally, a Neutrino coating has been applied to limit lens flare and ghosting for improved contrast and color accuracy when working in strong lighting conditions.

Photography Life Review Summary: Anybody buying this lens should know that this is a manual-focus-only lens. In this ultra-wide spectrum, it is not such a problem – Irix offers a well-designed manual focus ring with hyperfocal scale, focus lock and focus snap at infinity. The Irix 11mm f/4 is a lens for rather special purposes and I do not recommend starting with it to anyone who has not photographed with an ultra wide-angle lens yet. Creative and advanced photographers looking for new tools and perspectives may feel attracted to this lens though, so I would certainly recommend them to look into this offering from Irix. Read the full IRIX 11mm f/4 Review by Photography Life.

IRIX 11mm f/4 Specifications

Lens Specifications
Lens TypePrime Lens
Focal Length11mm
Mount TypeCanon EF, Nikon F, Pentax K
FormatFull Frame / FX
Compatible Format(s)Full Frame / APS-C
Compatible with TeleconvertersNo
Image StabilizationNo
Aperture Information
Aperture RingNo
Maximim Aperturef/4
Minimum Aperturef/22
Maximum Angle of View (Full frame or larger format)126°
Optical Information
Lens Elements16
Lens Groups10
Diaphragm Blades9 (Rounded)
Extra-Low Dispersion Glass Elements2
Special Glass ElementsFour HR Elements
Aspherical Elements3
Nano CoatingYes
Focus Information
FocusManual Focus
Built-in Focus MotorNo
Minimum Focus Distance10.83" (27.5 cm)
Filter Information
Filter SizeN/A
Accepts Filter TypeN/A
Physical Characteristics
Weather / Dust SealingYes
Mount MaterialMetal
Dimensions4.65 x 4.06" (118 x 103 mm)
Weight1.61 lb / 730 g for Firefly, 1.74 lb / 790 g for Blackstone
Other Information
Available in ColorsBlack

MTF Chart

Irix 11mm f/4 MTF Chart

Lens Construction

Irix 11mm f/4 Lens Construction

Sample Images

Irix 11mm f4 Image Sample (1) Irix 11mm f4 Image Sample (25)

Irix 11mm f4 Image Sample (18) Irix 11mm f4 Image Sample (19)


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