The World's Largest Telephoto Lens // canavarlar

http://www.zeiss.com/c12567a8003b58b9/Contents-Frame/8baac109cb80bddfc12571e100393a1b

The World's Largest Telephoto Lens
On display at Photokina in Cologne:
Hall 2.1, Booth B010.

Never before has the world of photography seen such a lens. Developed for
long distance wildlife photography this supertele lens provides 21x
magnification. In search of the highest imaginable image quality the client
decided for 6x6 medium format and the Hasselblad 203 FE as the best camera
he is aware of.

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. This 256 kg behemoth also required
Carl Zeiss to develop totally new ways of operating a telephoto lens, including
servo controlled aiming and focusing.

Drawing from its expertise in satellite and space optics as well as
semiconductor fabrication lenses Carl Zeiss was happy to accept the challenge.

STL Sonnar T* 4/1700: Side View

STL Sonnar T* 4/1700: Topview