IRIX 11mm f/4 Firefly Lens for Canon EF

IRIX 11mm f/4 Firefly Lens for Canon EF

IRIX 11mm f/4 Firefly Lens for Canon EF

B&H # IR11FFC MFR # IL-11FF-EF
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Product Highlights

  • 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
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Style: Firefly

Firefly Blackstone

Mount: Canon EF

Canon EF Nikon F Pentax K

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Price: $574.95

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IRIX 11mm f/4.0 overview

  • 1Description

A versatile ultra-wide prime lens, the Canon EF-mount 11mm f/4 Firefly Lens from Irix 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.

In addition to the imaging performance, this 11mm f/4 utilizes a manual focus design for fine-tuned control, and incorporates a unique positive focus lock to secure the focusing position at any point for consistent, repeatable shooting. As the Firefly version of this focal length, this lens is also distinguished by a lightweight ABS plastic exterior, printed lens markings, and weather-sealing about the lens housing to permit working in trying environmental conditions.

The Firefly version of the 11mm f/4 lens features a lightweight ABS plastic exterior construction that is sealed against moisture and dust along the main body of the lens. The Firefly construction also incorporates a rubber focus ring for improved grip and control, and has printed focus distance and depth of field scales to aid working with pre-focusing and hyperfocal focusing techniques.
Ultra wide-angle prime designed for full-frame Canon EF-mount DSLRs, this lens can also be used on APS-C models where it provides a 17.6mm equivalent focal length.
Three aspherical, four high-refractive index, and two extra-low dispersion elements are featured within the optical design to limit both spherical and chromatic aberrations, as well as color fringing and distortion, for improved clarity, sharpness, and even illumination.
A Neutrino coating has been applied to limit lens flare and ghosting for improved contrast and color fidelity.
Manual focus designed is benefitted by a positive focus lock mechanism to secure your focus position at any point to limit unwanted shifting of focus.
A hard click stop indicates the infinity position on the focus ring for easy use in low-visibility conditions.
Large depth of field scale benefits using hyperfocal and pre-focus techniques.
Built-in petal-shaped lens hood blocks stray light in order to reduce lens flare, and also protects the front element of the lens.
Rear of the lens accepts 30 x 30mm cut gel filters.
Rounded nine-blade diaphragm contributes to smooth bokeh.
In the Box
IRIX 11mm f/4 Firefly Lens for Canon EF
  • Front Lens Cap
  • Rear Cap for Canon EF-Mount Lenses
  • Soft Lens Pouch (Gray)
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description

    IRIX 11mm f/4.0 specs

    Performance
    Focal Length 11mm
    Aperture Maximum: f/4
    Minimum: f/22
    Camera Mount Type Canon EF
    Format Compatibility 35mm Film / Full-Frame Digital Sensor
    Angle of View 126°
    Minimum Focus Distance 10.83" / 27.5 cm
    Optical Design 16 Elements in 10 Groups
    Diaphragm Blades 9, Rounded
    Features
    Autofocus No
    Physical
    Filter Thread Rear:
    Dimensions (DxL) Approx. 4.65 x 4.06" / 118 x 103 mm
    Weight 1.61 lb / 730 g
    Packaging Infoauzrwvaaswcyzfvdbseddced
    Package Weight 3.2 lb
    Box Dimensions (LxWxH) 7.4 x 5.8 x 5.7"

    IRIX 11mm f/4.0 reviews

    11mm f/4 Firefly Lens for Canon EF is rated 4.4 out of 5 by 5.
    Rated 5 out of 5 by from Super Wide Angle Lens Very well constructed. Maintains Rectilinear image despite the great angle of view. Resolution is as advertised, very sharp! Seems to maintain sharpness throughout the field of view, corner to corner. CA is quite low, and any residual can be eliminated in post production. The only con is that the lens is quite bulky. Comes with case, and really fancy packaging, and a built - in lens shade. Canon would do well to provide the above, especially considering their prices!
    Date published: 2018-03-12
    Rated 5 out of 5 by from great for landscape, slot canyon photos This lens has turned out great for landscapes and slot canyons, which we need out here in the southwest. I was a little worried about the sharpness and depth of field in slot canyons, but it is working out awesome for sharpness and depth of field. I have a canon 17-40, and this lens is not quite as sharp but way more functional in tight places like indoors or in slot canyons; also have the rokinon 12mm and this has almost the same field of field to the edges, without the barrel distortion of the rok 12 that ends up giving a much wider field of view at the corners. The rear filter holder is also great, considering the huge front glass diameter, so adding nd filters is cheap and easy (irix sells their own rear nd filters where you get like 15 filters for $10, as compared to something like a wonderpana for this front element that would run $300-400 to set up). Chromatic aberration is definitely there, but easy to get rid of in Lightroom. The manual focus makes it a little more challenging, but at the wide angle almost everything comes into focus at f8 or smaller.
    Date published: 2018-01-14
    Rated 4 out of 5 by from I am still in the testing stage I purchased the lens to be used primarily for architectural purposes, both interior and exterior. I am comparing it to my Canon 10-18 mm lens. I was hoping that there would be a distinct sharpness difference, but in comparison tests I have yet to discern any. Nevertheless, I do like the fixed lens aspect but am still learning to work with a manual lens and especially in this case with the hyperfocal calibration scales.
    Date published: 2017-07-26
    Rated 5 out of 5 by from Amazing lens, especially for the price! This is an amazing�lens. The built quality is on par with Canon L lenses and Sigma Art lineup. Super wide angle with minimal distortion, the sharpness holds reasonably well all the way to the corners.
    Date published: 2017-12-07
    Rated 3 out of 5 by from needs a flash to work better , hard to balance light still having trouble with photo light even maybe a lot to do with me
    Date published: 2017-09-24
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    IRIX 11mm f/4.0 Q&A

    IRIX 11mm f/4.0 accessories

    Designed for use with:

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