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 Firefly Lens Review
Irix 11mm f/4 Firefly Lens Review
Irix 11mm f/4 Firefly Review | ePHOTOzine
Irix 11mm f/4: Thorough Test and Impressions from Alberto Bouzón - Irix USA