11mm - Irix lenses were designed with both the effort and experience, of not only engineers, but also photographers. Swiss precision and Korean innovation create
Irix 11mm f/4.0 Blackstone en Firefly - Irix Benelux
Irix 11mm Review
Irix 11mm f/4 Firefly Review | ePHOTOzine
Please Add IRIX 11mm f/4 Firefly & Blackstone to Product List: Site Feedback and Help Forum: Digital Photography Review
IRIX 11mm f/4 Blackstone Lens for Pentax K IL-11BS-PK B&H Photo
Irix 11mm f/4 lens for Pentax K-mount now up to $50 off - Pentax Rumors
Irix 11mm f/4 ' Firefly' lens review with samples (Full-frame and APS-C) - YouTube