三兄弟遊直壁
本帖最後由 C.L.Chan 於 2022-3-12 10:52 編輯三兄弟遊直壁. 3 brothers visiting Straight Wall. UT 2022 03 11, 14h13m, Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, Focal Length=4 meter, Atmospheric condition: Transparent: 8/10, Seeing: 7/10.The photo was taken at Kennedy Town 堅尼地城, Hong Kong.
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