Fig.5--11--
Fig.5
| 200/4000 mm Schiefspiegler in coma-free device Primary is spherical. The spherical secondary is cylindrically deformed. |
| With this instrument all other devices of the Schiefspiegler were tried out; warped secondary and the different dioptrical correctors. |
| To left in the background (on the clock) a 60/1200 mm Schiefspiegler in anastigmatical device with spherical mirrors. |