The Maksutov-Cassegrain, a catadioptric hybrid optical system ranking fourth in popularity, was invented by Dmitri Maksutov in 1944, with A. Bouwers potentially developing it independently. This ...

In what is turning into a big day for Aputure lighting gear announcements, the company has unveiled the STORM Parallel Beam 70, a 70cm diameter true Cassegrain mirror system optimized for the STORM ...

THE new solar telescope of the University Observatory, Oxford, which was formally declared open by the Vice-Chancellor on June 11, is in its essence a vertical Cassegrain telescope of 12 J inches ...

The New Telescope for Edinburgh Observatory.—In Engineering for Sept. 6 and 20, and Oct. 4 and 18, is a description of the 36-in. reflecting telescope for Edinburgh Observatory, made by Messrs. Sir ...