Ultron 21mm F1.8 Aspherical

voigt_21_1.8
The 21mm/f1.8 Ultron is one of the fastest and widest M mount wide angle lenses in the market today. 1/5 the price of the 21 Summilux and delivers almost the same image quality, this beast is considered the best value for money in it’s class.

Specification:
Focal Length 21mm
Aperture Ratio 1:1.8
Smallest Aperture F22
Lens Construction 11 groups 13 elements
Picture Angle 91 degree
Aperture Blades 10 pieces
Nearest Focusing Distance 0.5m
Diameter φ69mm
Length 78.4mm
Weigth 412g
Filter Size φ 58mm
Mount M Mount