Aspheron 5.5 mm super wide-angle

Aspheron 5.5 mm super wide-angle optical accessory for Switar 10 mm.

This aspherical optical accessory, specially designed for use with the Switar 10 mm f/1.6 wide-angle lens with presetting of the diaphragm makes it possible to practically triple the field of view without detracting from the quality of the picture.
– Resultant focal length: 5.5 mm
– Field of view: 95°
– Horizontal field angle: 84° (projector aperture)
– Distortion: negligible
– Correction of the diaphragm: nil
– Concave surface: spherical
– Convex surface: aspherical
– Anti-reflection treatment: multicoated
– Retaining ring for smooth circular filter
– Front thread: M 77 x 0.75.