20 x 180" ISO/Gain: 210 - T=-5C. Узкополосник Optolong L-Ultimate
Red zoneLight Pollution:
Protvino Moskovskaya Obl, Russia
Jul 29th, 2025
1 h 0 m
17
3
A relatively short integration time, in a red zone with light pollution, and during the white nights (late July). So I applaud the capabilities of the dual-band filter Optolong L-Ultimate.
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