Irix 11 mm f/ 4 Lens

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Optical design

Format: 35mm SLR

Type: Prime lens

Focusing: Manual Focus (MF)

Lens mounts: Canon EF, EF-S, Nikon F (FX, DX), Pentax K

First year of production: 2017

Optical design: 16 elements in 10 groups

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Owners (2)

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Average price: $800

Specifications:

Focal length	Max. aperture	Min. aperture	Blades	Min. Focus (m.)	Filter Ø (mm.)	Weight (gr/oz)	Length (mm/in)
11mm	f/4.0	f/22	9	0.28	no	790/27,9	103/4,1

Additional information:

The Irix 11mm F4 is an ultra wide angle prime lens for full frame SLRs and SLMs.

It is coming in two versions: Blackstone and Firefly. Both feature the same optical formula, but the more expensive Blackstone features an aluminum-magnesium alloy construction, metal-grooved focusing ring, and anti-scratch coating. The Firefly trades these things in order to save you weight and cash. It is cheaper and features an anti-slip rubber focusing ring and a lightweight construction that is 12% lighter than its all metal brother.

Both versions are weather sealed against dust and moisture.

The UV light reactive engraved markings on the Blackstone glow in the dark, making this ultra-wide 11mm the better lens for night shooting.

Links to online resources:

Manufacturer

PDF Files:

User manual (Basic, Eng.) (views: 4)
User manual (Extended, Eng.) (views: 11)
Brochure (Eng.) (views: 6)

Posted by: Andreas Lindemann Date of publication: 24.10.2018

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Mechanical quality	4.00	1
Optical quality	4.00	1
Usability	3.00	1
Pricing / Value	5.00	1
Bokeh	4.00	1
Overall lens rating	4.00

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