Teleros

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The Teleros is a telephoto lens made by Ross of London. It was introduced in 1922, and replaced the Telecentric. It was made until at least 1938. It was made in a wide range of focal lengths, from a 4-inch Leica-fitting lens to a 40-inch lens intended for 8½x6½ inch plate cameras. It was available as an f/5.5 with magnification of two (i.e. the back-focus is one half of the focal length) or an f/6.3 with a magnification of three.

Ross Xpres & Teleros advertisments 1937 image by Nesster (Image rights)

Links

• Leica-mount 4-inch f/5.5 Teleros sold at the ninth Westlicht Photographica Auction, on 20 May 2006.
• Tropical Folding Minex with a Ross Xpres and a Teleros of about 1934, at Early Photography.