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Irix 11 mm f/4 Blackstone

Manufacturer Irix
Model 11 mm f/4 Blackstone
Lens style Wide angle
Focal length 11 mm
Maximum aperture f/4
Angle of view 126 o
Closest focusing distance 0.28 m
Maximum magnification
Minimum aperture 22
Number of diaphragm blades 9
Auto focus type MF
Lens Construction 16 elements / 10 groups
Filter diameter 0 mm
Macro No
Available mounts Canon EF
Nikon F
Pentax K
Dimensions 118 x 103 mm
Weight 815 g
Additional information Announced: 2.03.2017
Size and wieght for Canon version 3 aspherical elements, 4 HR elements, 2 ED elements
Average rating (3 owners reviews)
Build quality
Optical quality
Value for money


4.56 Good
Owners reviews (3)
  1. Tex Andrews
    Tex Andrews 5 June 2022, 17:33
    Build quality
    Optical quality
    Value for money


    IP 73.213.x.x
    Owner since: 3 months
    Price: $401.74
    User profile: Professional

    Cons: Few to none, at least none that wouldn\'t be expected, such as typical UWA stretching distortion, and some difficulty focusing----although as with all UWA lenses nearly everything is in focus at normal working distances. A bit of chromatic aberration out towards the edges, easily rectified in a digital workflow.

    Pros: For the money, it\'s crazy not to have this lens if you are working in tight spaces. Has saved the day twice now since I bought it---which is remarkable considering how few times a lens like this is truly needed.

    Summary: Just buy it, even if you don\'t frequently use this FL in FF. It\'s arguably the best UWA \"anchor\" lens around, and I have the estimable Pentax 15-30 for FF and 25 and 28-45 for Pentax medium format---it gets you shots you might not have thought possible.

  2. David Alexander
    David Alexander 6 March 2021, 18:46
    Build quality
    Optical quality
    Value for money


    IP 73.61.x.x
    Owner since: 6 months
    Price: $549
    User profile: Semipro

    Cons: Angle so wide that you always need to be careful that your feet aren’t in the frame. Due to it’s shape you are unable to use conventional filters. Takes gel filters which are not inexpensive, scratch very easily, and are next to impossible to use in the field.

    Pros: Best wide angle that I have ever used. Spectacular color rendering with very minimal, if any distortion.

    Summary: You will not regret buying this lens. It is built like a bank vault. I have the Blackstone version which is very, very heavy. You may wish to consider the Firefly version which has more plastic parts although the literature says that the optics are identical if weight is a consideration.

  3. Cornelis
    Cornelis 17 January 2018, 12:49
    Build quality
    Optical quality
    Value for money


    IP 77.169.x.x
    Owner since: 1 year
    Price: 860 euro
    User profile: Amateur

    Cons: Very poor lenscap

    Pros: Wide, So wide jou stop wishing for something wider Sharp, not really less than my TSE4/17

    Summary: All you need for wide Not to be an one walkaround lens but a good pair with a 24-105 mm

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