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I watched the movie of Castor double star in Gemini, the difference between the aperture and the eccentric aperture.
It is a movie of 45 cm and 16 cm (eccentric aperture). The position is advantageous near the zenith, but in winter-type weather, it is clearer to narrow down to 16 cm, which is a typical seeing in Japan.
2022-03-07
It is a movie of 45 cm and 16 cm (eccentric aperture). The position is advantageous near the zenith, but in winter-type weather, it is clearer to narrow down to 16 cm, which is a typical seeing in Japan.
2022-03-07