Tal-250K, LB PAG 3x, equivalent focal length ~6.3 meters. Camera QHY5III290C, 100% of original. Image quality at the time of shooting about second grade on the Antoniadi scale, noticeable high-frequency turbulence, light haze, no wind. Observatory "AstroVetkino" https://astronomy.ru/forum/index.php/to ... 764.0.html.
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