|
The Canon FL 1200mm f/11 was a super-telephoto lens marketed by Japanese optical manufacturer Canon in June 1972.〔http://www.canon.com/camera-museum/lens/fl/data/100-1200/fl_1200_11.html〕 It was the longest super-telephoto lens in the Canon FL system.〔http://www.mir.com.my/rb/photography/companies/canon/fdresources/fdlenses/1200mm.htm〕 The lens was part of a group of four convertible lenses: 400mm f/8, 600mm f/8, 800mm f/8, and the 1200mm. The lenses were in two parts: a focusing and aperture control section which mounted directly to the camera using the Canon FL breech-lock bayonet mounting ring; and the head end, which determined the focal length of the lens. The control section was common to each of the four head-end sections. The 1200mm head end was a preset aperture type, so the lens had to be stopped down manually for exposure. The original FL 1200mm is now a rare and very valuable collector's item. The only known existence of the entire set of the four lenses in this series is in a private collection located in Indiana, USA. ==Technical data== *Lens construction: 7 elements in 5 groups *Focus adjustment: Manual focus *Aperture range: f/11-64 *Closest focusing distance: 40m / 131ft *Filter size: 48mm (may be rear drop-in) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Canon FL 1200mm lens」の詳細全文を読む スポンサード リンク
|