Huge ! ! !
Huge mirror lens 2540mm focal length, aperture F/8 ! ! ! These lenses were used by the NASA for tracking the Saturn V or similar. I was told by the grandson of its producer John H. Ransom, that the tragedy of the Space Shuttle Challenger was tracked and filmed with Jonel lenses ( the most of them are still in use ). They used high speed 70mm movie cameras like the Photosonics 70mm 10R with up to 125 fps on 6x6 frames ( this camera is also for sale, seperate ) It is a Schmidt-Cassegrain design with a two element field corrector to produce a 57x57mm image format ( 80mm image diameter or more ). This lens is unique. Optics mint, barrel mint- ( some loss of paint ). The barrel is incorporating a system to avoid humidity inside, it is very rigid, and the design is very sophisticated, compared to modern Astro cameras. Original cost : a family home. 180 pounds in original case. Ask me for tripod and head and for focusing units. |