Measurement comparison between CCD frames obtained at RNAO and ASV

During the night of March 31, 2019 we performed CCD framing for 24 double or multiple stars with the 2m telescope at the Rozhen National Astronomical Observatory. CCD frames for the same stars have been also obtained with the 1.4 m telescope at the Astronomical Station Vidojevica, during two nights, April 1 and 2, 2019. The CCD cameras possessed by both observatories are of the same type, ANDOR iKon-L. A comparison of the measurement results of the CCD frames obtained at the two observatories, concerning separations and position angles, is presented in this paper. We also present precise focal lengths for the 2m and 1.4m telescopes with the attached ANDOR iKon-L cameras.