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 Type | Prime Lens |
| Focal Length | 11mm |
| Mount Type | Canon EF, Nikon F, Pentax K |
| Format | Full Frame / FX |
| Compatible Format(s) | Full Frame / APS-C |
| Compatible with Teleconverters | No |
| Image Stabilization | No |
| Aperture Information | |
| Aperture Ring | No |
| Maximim Aperture | f/4 |
| Minimum Aperture | f/22 |
| Maximum Angle of View (Full frame or larger format) | 126° |
| Optical Information | |
| Lens Elements | 16 |
| Lens Groups | 10 |
| Diaphragm Blades | 9 (Rounded) |
| Extra-Low Dispersion Glass Elements | 2 |
| Special Glass Elements | Four HR Elements |
| Aspherical Elements | 3 |
| Nano Coating | Yes |
| Focus Information | |
| Focus | Manual Focus |
| Built-in Focus Motor | No |
| Minimum Focus Distance | 10.83" (27.5 cm) |
| Filter Information | |
| Filter Size | N/A |
| Accepts Filter Type | N/A |
| Physical Characteristics | |
| Weather / Dust Sealing | Yes |
| Mount Material | Metal |
| Dimensions | 4.65 x 4.06" (118 x 103 mm) |
| Weight | 1.61 lb / 730 g for Firefly, 1.74 lb / 790 g for Blackstone |
| Other Information | |
| Available in Colors | Black |
MTF Chart
Lens Construction
Sample Images
