Irix 11mm f/4 ' Firefly' lens review with samples (Full-frame and APS-C) - YouTube
11mm - Irix lenses were designed with both the effort and experience, of not only engineers, but also photographers. Swiss precision and Korean innovation create
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Irix 11mm f/4.0 and Irix 15mm f/2.4 - Field of view comparison | Flickr