The Magnitude Measuring System of the Cassegrain Focus Camera of 1 MR. C. C. Telescope

In this article the results of examining the magnitude measuring system of the camera mounted at the Cassegrain focus of 1 m telescope at Yunnan Observatory with the observation method are summarized and a conversion equation between U. B. V. system and the instrument system is found. And their suitable scopes are discussed and a basis for photographic photometry with the 1 m telescope is also provided.