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Irix 15 mm f/2.4 Blackstone

Manufacturer Irix
Model 15 mm f/2.4 Blackstone
Lens style Wide angle
Focal length 15 mm
Maximum aperture f/2.4
Angle of view 110 o
Closest focusing distance 0.28 m
Maximum magnification
Minimum aperture 22
Number of diaphragm blades 9
Auto focus type MF
Lens Construction 15 elements / 11 groups
Filter diameter 95 mm
Macro No
Available mounts Canon EF
Nikon F
Pentax K
Sony E
Sony FE
Dimensions 114 x 100 mm
Weight 685 g
Additional information Announced: 21.03.2016
2 aspherical elements, 3 HR elements, 2 ED elements
Aluminum and magnesium body
Weight data for Canon version
Average rating (1 owners reviews)
Build quality
Optical quality
Value for money


5.00 Excellent
Owners reviews (1)
  1. IKM
    IKM 1 July 2017, 11:20
    Build quality
    Optical quality
    Value for money


    IP 84.177.x.x
    Owner since: 3 months
    Price: 715 €
    User profile: Amateur

    Cons: Crappy hood Strong halo when pointed towards the sun stopped down Some minor flares No aparture ring Miscalibrated focus ring when delivered

    Pros: Mechanical quality: all metal except of hood Optical over-all quality Ultra-wide and ultra sharp Minor and simple barrel-type distortion easy to correct Beatiful color rendering It takes front and rear filters Price

    Summary: It\'s a manual focus lens but no-one really needs autofocus with ultra-wides. The focus ring is quite stiff but I like it this way. Irix leaves the mechanical focus ring calibration to the customer (why?) but it\'s not a big deal. I simply left the discalibration since I do not need the distance scale. The lens has no aparture ring so it works only on digital Nikons and maybe on F6 and F5. It definitely does not work on an F4 and older 35mm cameras. The optical quality is superb despite of the back lit halo. For comparable image quality with ultra-wides you have to pay twice as much for a Nikkor or four times as much for a Zeiss lens. The all-metal built quality is very good except of the plastic hood. It does not hold tight on its bayonet and easily falls off. Over all it is a wonderful lens with an extraordinary value for money. My recommendation: get one!

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