Irix 11mm f4 Firefly

Objective IRIX 11mm Firefly

A versatile ultra-wide-angle main lens, Irix's NIKON F-mount 11mm f/4 Firefly lens balances sophisticated optical design with a lightweight and durable physical build. Aspherical, ultra-low dispersion and high refractive index elements are used to suppress color fringes, chromatic and spherical aberrations, as well as unwanted distortion, and also contribute to a high degree of sharpness and clarity. In addition, a Neutrino coating has been applied to limit lens flare and ghosting to improve contrast and color accuracy when working in bright lighting conditions.

In addition to image performance, this 11mm f/4 uses a manual focus design for precise control and incorporates a unique positive focus lock to ensure focus position at any point for consistent and repeatable shots. Like the Firefly version of this focal length, this lens is also distinguished by a lightweight ABS plastic exterior, printed lens markings and weatherproof around the lens housing to allow working in harsh environmental conditions.

• The Firefly version of the 11mm f/4 lens features a lightweight ABS plastic outer construction that is sealed against moisture and dust along the main lens body. The Firefly build also incorporates a rubber focus ring to improve grip and control, and has printed focus distance and depth of field scales to help work with hyperfocal and prefocus focusing techniques.
• Ultra-wide angle designed for FX-format F-mount NIKON DSLRs, this lens can also be used on DX models where it provides a focal length equivalent to 16.5mm.
• The optical design includes three aspherical elements, four high refractive index and two extra low dispersion to limit spherical and chromatic aberrations, as well as stripes and color distortion, to improve clarity, sharpness and even illumination.
• A Neutrino coating has been applied to limit lens flare and ghosting to improve contrast and color fidelity.
• The designed manual focus benefits from a positive focus lock mechanism to secure your focus position at any point to limit unwanted focus shifting.
• A strong click stop indicates the infinite position on the focus ring for easy use in low visibility conditions.
• Great depth of field scale benefits using hyperfocal and prefocus techniques.
• The built-in petal-shaped lens hood blocks stray light to reduce lens flare and also protects the front element of the lens.
• The back of the lens accepts 30 x 30 mm cut gel filters.
• The rounded nine-blade diaphragm contributes to a smooth bokeh effect.
• Includes complimentary additional rear lens cap.