World’s longest telephoto lens – 1700mm f/4


September 13, 2006

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September 14, 2006 One of the displays worth visiting at Photokina when it opens in Cologne on September 26 will be the Carl Zeiss stand where the optical specialist will be showing the world’s largest telephoto lens. Developed for long distance wildlife photography, the supertele lens is purpose-built for the Hasselblad 203 FE and provides 21x magnification.

At 1700 mm focal length and a speed of f/4 this lens put requirements on optical glas, lens assembly and quality assurance methods, never before encountered in photo lens manufacture. Hand-holding the lens is not an option, no matter how big you are – it weighs in at 256 kg and required Carl Zeiss to develop totally new ways of operating a telephoto lens, including servo controlled aiming and focusing.

Via Engadget

About the Author
Mike Hanlon Mike grew up thinking he would become a mathematician, accidentally started motorcycle racing, got a job writing road tests for a motorcycle magazine while at university, and became a writer. As a travelling photojournalist during his early career, his work was published in a dozen languages across 20+ countries. He went on to edit or manage over 50 print publications, with target audiences ranging from pensioners to plumbers, many different sports, many car and motorcycle magazines, with many more in the fields of communication - narrow subject magazines on topics such as advertising, marketing, visual communications, design, presentation and direct marketing. Then came the internet and Mike managed internet projects for Australia's largest multimedia company, (Australia's largest Telco), (Australia's largest employment site),,, and a dozen other internet start-ups before founding Gizmag in 2002. Now he writes and thinks. All articles by Mike Hanlon
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