Irix 11mm f/4 sample images

Irix 11mm

Irix 11mm f/4 Firefly at a glance:

  • Canon EF-Mount/Full-Frame Format
  • Aperture Range: f/4 to f/22
  • Three Aspherical Elements
  • Two ED and Four HR Elements
  • Neutrino Coating
  • Manual Focus Design with Focus Lock
  • Rubberized Focus Ring
  • Depth of Field and Focus Distance Scales
  • Weather-Sealed ABS Plastic Housing
  • Rounded Nine-Blade Diaphragm

Photography Blog posted a set of sample photos shot using an Irix 11mm f/4 lens on a Canon EOS 5Ds. The Irix 11mm f/4 is a brand new manual focus ultra-wide-angle lens for 35mm full-frame DSLR cameras. I couldn’t get if they tested the Firefly of the Blackstone edition of the lens.

Irix 11mm f/4: Amazon | Adorama | B&H Photo

Irix 15mm f/2.4: Amazon | Adorama | B&H Photo

Irix wide angle lenses now available at Adorama

Irix 15mm F/2.4

Adorama has the new Irix wide angle lenses in stock and ready to ship.

  • IRIX 15mm f/2.4 Firefly Manual Focus Lens $399.95 with free shipping
  • IRIX 15mm f/2.4 Blackstone Manual Focus Lens $599.95 with free shipping
  • IRIX 11mm f/4.0 Firefly Manual Focus Lens $575 with free shipping
  • IRIX 11mm f/4.0 Blackstone Manual Focus Lens $774.95 with free shipping

The “Blackstone” edition of the two Irix lenses have a premium finish and an aluminium-magnesium alloy, though the build quality of the “Firefly” is anything but cheap.

Irix 11mm
Irix 11mm f/2.4 Blackstone
Videos about the IRIX 15mm f/2.4 and the weather sealing of the Blackstone version after the break.
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Irix 11mm f/4 video review

Irix 11mm
Irix 11mm f/4 Firefly

The Irix 11mm f/4, manufactured by TH Swiss and not shipping yet, is a highly anticipated lens. Christopher Frost Photography posted a pretty informative, 10 minutes video-review of the Firefly version of the Irix 11mm f/4 (the other, more rugged one is Blackstone). He used a Canon EOS 6D and an EOS M3 to test the Irix 11mm f/4.


Irix 11mm f/4 specifications after the break

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Canon patent for 11mm F4L USM lens


This could be a very cool lens, if the optical formula described in this Canon patent will ever go into production. Canon filed a patent for a 11mm F4L USM lens. The optical formula appears to refer to a relatively small lens with good control of optical distortions.

  • Patent Publication No. 2016-81005
    • Published 2016.5.16
    • Filing date 2014.10.22
  • Example
    • Focal length 11.33 11.47
    • F-number 4.11 4.12
    • Half angle of 62.36 62.08
    • Image height 21.64 21.64
    • Overall length of the lens 109.13 109.12
    • BF 38.90 38.40
  • [0003]However, even in the little lens distortion, by the emphasis of perspective, it may appear to be distorted photographic image. Furthermore, suitable amount of distortion varies depending on the subject and the composition to be photographed. For this reason, it is required that the distortion in the variable.
  • Canon patent
    • It is less distortion in the normal state
    • A large distortion in the distortion change state

[via Egami]