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The LEICA DUOVID 8 + 12 x 42 by Leica Camera AG, Solms are the world's first high-performance binoculars with switchable magnification from 8x to 12x. The magnification is switched by a simple rotation movement on the binocular tube. Due to the ADC automatic diopter compensation, the optical adjustment for defective eyesight is retained when the magnification is changed. Viewing comfort is enhanced by new, patented, rotatable eyecups, while HDC coating gives the outer optics extra wear-resistance. The magnification switching facility makes the binoculars highly adaptable to different viewing situations: the 8x magnification offers a particularly steady image with high field depth and a large visual field of 120 m at a distance of 1,000 m. The 12x magnification gives a 50% larger image of even the most minute details and is especially suitable for long-distance viewing.
When twilight falls, the high twilight factor of 22.45 of the 12x magnification optics is excellent for viewing small details. As darkness deepens, the 8x magnification optics prove valuable due to the brighter image produced by the larger exit pupil. Stephan Albrecht, Product Manager for Sports Optics at Leica Camera AG, expects the new LEICA DUOVID 8 + 12 x 42 to put a stop to the discussion about the best magnification for binoculars. 'The Duovid formula is: Two binoculars in one. This model is the all-in-one specialist for completely different applications. And the superlative quality of the successful LEICA Trinovid full size binocular series is achieved at both magnifications, Albrecht continues.
Compared with monocular instruments such as spotting scopes, riflescopes and photo and video lenses, the necessary coupling of two optical tubes is a particularly demanding task. One technical challenge was the diopter compensation, which depends on the magnification. The ADCTM (Advanced Diopter Compensation) is achieved by a newly developed mechanical design using a cam. When the magnification is switched at the left eyepiece, a gearwheel moves the cam. This alters the position of the focusing lens which is coupled to the diopter compensation setting. This process can be seen on the outside of the binoculars by the rotating diopter scale on the top of the central drive.
Another innovation are the patented eyecups which can be pulled out to two different clickstop positions besides the setting for eyeglass wearers. The LEICA DUOVID 8 + 12 x 42 are therefore the first high end binoculars to accommodate the anatomic differences of the human face, offering optimum viewing conditions for all users. The eyecups can also be dismantled for easy cleaning.
The easy-grip rubber armoring - in either black or green and the ergonomic shape of the binoculars ensure safe handling even in damp weather or when wearing gloves. The proven multi-function central drive is highly convenient for setting the focus and diopter compensation.
The LEICA DUOVID 8 + 12 x 42 features optical coating with extra resistance to environmental influences. In Leica's modern HDCTM coating process, the vapor-deposited coating materials are compacted with a plasma source in a high vacuum. This makes the anti-reflection coatings, which are only a few thousandths of a millimeter thick, highly resistant to external influences. HDCTM stands for High Durable Coating a long-life coating of the outer optics. Thanks to this technique, the optical quality features of Leica binoculars - brilliance, contrast and high light transmission - last even longer, even when the binoculars are used in extreme conditions such as hunting, astronomy, field ornithology and water sports.
Like Leica Trinovid binoculars, the LEICA DUOVID 8 + 12 x 42 are also waterproof to a depth of 5 meters and nitrogen-filled.
The LEICA DUOVID 8 + 12 x 42 will be available at Leica stockists from March 2002.