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Specification

Source of data

• Own research.

From the Photographic Applications in Science, Technology, and Medicine magazine (1969)

Even more compact is a mirror lens made by Meibo in Japan and marketed - primarily for the amateur - in two versions by Hanimex and by Lenco respectively. The Hanimex version has a focal length of 300mm, maximum aperture f/6.3 and comes with a Praktica mount. The Lenco version, known as the 250mm Lentar f/5.6, is similar but has a slightly more powerful glass lens element, thus producing the shorter focal length and larger relative aperture. The Lentar comes with a 4x neutral density filter and a T-adapter mount.

Typical characteristics of mirror (reflex) lenses

• Catadioptric system consisting of curved mirrors and optical glass;
• Much shorter, lighter and less expensive designs than conventional super telephoto lenses;
• Outstanding correction of chromatic aberrations;
• Since the aperture is fixed, neutral density filters are used to obtain a smaller aperture;
• Doughnut-shaped out-of-focus highlights.

From the editor

The same lens was sold under the name HANIMEX MIRROR LENS 300mm F:6.3. It is interesting that the Hanimex lens, unlike the Weltblick, had a silver barrel. The minimum value on the distance scale was 7 ft. (=2.1m).

Lenses with similar focal length