Abstract
The BVR photometry of 3C 390.3 was carried out at three different observatories i.e. SAO RAS in North Caucasus (Russia), the Crimean Laboratory of the Sternberg Astronomical Institute (CL SAI, Russia) and the Abastumani Astrophysical Observatory (AAO) in Georgia. The observations at the SAO RAS were obtained with the 1 m and 60 cm Zeiss telescopes equipped with an offset guided automatic photometer. The VRI photometry at the Crimean Laboratory was obtained with the 60 cm telescope equipped with a CCD camera. BVRI observations at the AAO were obtained with the 70 cm menisk telescope equipped with a CCD camera.
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