太陽黑子 1109 (20100928)

That's one of the impressive sunspots in 2010.
APM 80/480+DMK21&DMK41
Acceptable seeing & poor transparency ...
APM 80/480+DMK21&DMK41
Acceptable seeing & poor transparency ...
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http://www.astrocafe.hk/
Nebulas 寫:没有想到 APM 80/480 表现如此好,现在想起社长当时出 FC-76 时候的话了——这个口径范围更毒的镜子。
xiaoer 寫:唉,我估我都係會忍唔住手......
CaK......stunning image......
but an excellent lens with good violet correction is needed, which I don't have.....
From the spec, the CaK module supports only up to 100 mm lens, so the best resolution that can be achieved is limited. Am I correct?
社長 寫:Nebulas 寫:没有想到 APM 80/480 表现如此好,现在想起社长当时出 FC-76 时候的话了——这个口径范围更毒的镜子。
應該說,Andy 拍得特別好,David這位學生真是值得一讚