In addition to an aspherical surface, special glass with anomalous partial dispersion or high refractive power is used. Focusing combined with a floating element provides consistent high contrast performance through the entire working range, from close-up to infinity.
Order number | 11055 (CS: 11051) |
Lenses/groups | 8/6 + 1 filter screen (1 aspherical surface) |
Optical design | Total focusing with floating element |
Image angle (diagonal, horizontal, vertical) | approx. 42°, 35.5°, 24°, approx. corresponds to 56mm in 35mm format |
Aperture range | 2.5 to 22 |
Shortest distance | 0.5 m |
Largest image scale | 1:4.7 |
Filter thread size | 82 mm |
Dimensions (diameter/length) | 90 mm/93 mm |
Weight | 740g (CS: 890g) |