aat Acta Astrophys. Tau. Acta Astrophysica Taurica 2712-925X Kiselev Nikolai Nikolaevich, Mosсow, settlement Moskovskii, Tat'yanin Park Str., 12, Moscow, Russia. RU 121 UTTPNS Instruments and Methods TeA – Telescope Analyzer Emelianov Eduard Special Astrophysical Observatory of the Russian Academy of Sciences, Nizhnij Arkhyz 369167, Zelenchukskiy region, Karachai-Cherkessian Republic, Russia 31 03 2026 7 1 8 11 12 03 2026 Copyright (c) 2026 Eduard Emelianov 2026 Eduard Emelianov The metadata for this submission is licensed under a Creative Commons Attribution 4.0 International License. Copyright and publishing rights for texts published in Acta Astrophysica Taurica is retained by the authors, with first publication rights granted to the journal.Texts are free to use with proper attribution and link to the licensing (Creative Commons Attribution 4.0 International).

We have developed a multipurpose device for studying the optics and mechanics of the BTA and Zeiss-1000 telescopes. The heart of the device is a ZWO ASI 1600 MM Pro CMOS light detector mounted on a three-axis stage. The device was tested on the Zeiss-1000 and BTA telescopes. Based on the BTA tests, the spectrum of image oscillations along both axes was evaluated, as well as the possibility of using the device for estimating the aberration axis position (by direction of coma at the field of view), taking hartmannogramms, and recording images of stellar fields to measure coefficients of the pointing correction system.

instrumentation telescopes optics control Information on funding is not available