Summary:
A versatile ultra-wide prime lens, the 11mm f/4 Firefly Lensfrom Irix balances a sophisticated optical design with a lightweight, durable physical construction. Aspherical, extra-low dispersion, and high-refractive index elements are used to suppress color fringing, chromatic and spherical aberrations, as well as unwanted distortion, and also contribute to producing a high degree of sharpness and clarity. Additionally, a Neutrino coating has been applied to limit lens flare and ghosting for improved contrast and color accuracy when working in strong lighting conditions.
In addition to the imaging performance, this 11mm f/4 utilizes a manual focus design for fine-tuned control, and incorporates a unique positive focus lock to secure the focusing position at any point for consistent, repeatable shooting. As the Firefly version of this focal length, this lens is also distinguished by a lightweight ABS plastic exterior, printed lens markings, and weather-sealing about the lens housing to permit working in trying environmental conditions.
Performance
Focal Length 11mm
Aperture Maximum: f/4
Minimum: f/22
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Angle of View 126°
Minimum Focus Distance 10.83" / 27.5 cm
Optical Design 16 Elements in 10 Groups
Diaphragm Blades 9, Rounded
Features
Autofocus No
Physical
Filter Thread Rear:
Dimensions (DxL) 4.65 x 4.06" / 118 x 103 mm
Weight 1.61 lb / 730 g
Packaging Info
Package Weight 3.1 lb
Box Dimensions (LxWxH) 7.4 x 5.8 x 5.8"
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