有 27 筆資料符合您搜尋的條件
- 週三 19 9月, 2012 16:13
- 版面: 天文物理 Astrophysics
- 主題: 為什麼光速不變?
- 回覆: 43
- 觀看: 56236
- 週三 19 9月, 2012 16:11
- 版面: 天文物理 Astrophysics
- 主題: 為什麼光速不變?
- 回覆: 43
- 觀看: 56236
- 週四 28 6月, 2012 14:27
- 版面: 談天說地 Chatting Square
- 主題: 你人!
- 回覆: 14
- 觀看: 4201
- 週五 25 11月, 2011 13:12
- 版面: 天文話題 Everything about Astronomy
- 主題: Help! who know where to buy Citizen Astrodea CelestialWatch?
- 回覆: 1
- 觀看: 2876
Help! who know where to buy Citizen Astrodea CelestialWatch?
I am looking for the Astrodea series celestial watches by Citizen.
Can anyone tell me where I can find them in Hong Kong?
Thank you.
Can anyone tell me where I can find them in Hong Kong?
Thank you.
- 週五 11 11月, 2011 19:36
- 版面: 談天說地 Chatting Square
- 主題: 數學題
- 回覆: 39
- 觀看: 13737
- 週三 10 8月, 2011 21:17
- 版面: 天文話題 Everything about Astronomy
- 主題: Time to observe Perseids meteor shower
- 回覆: 12
- 觀看: 4634
Re: Time to observe Perseids meteor shower
chantszkin 寫:``The Perseids rapidly increase to a peak of 50-80 meteors per hour by the night of August 12/13 ``owl 寫:What is the best time to observe Perseids meteor shower in Hong Kong this year? Should it be the coming Friday night - Saturday morning? or Saturday night - Sunday morning?
Thank you chantszkin.
- 週三 10 8月, 2011 11:57
- 版面: 天文話題 Everything about Astronomy
- 主題: Time to observe Perseids meteor shower
- 回覆: 12
- 觀看: 4634
Time to observe Perseids meteor shower
What is the best time to observe Perseids meteor shower in Hong Kong this year? Should it be the coming Friday night - Saturday morning? or Saturday night - Sunday morning?
- 週二 19 4月, 2011 15:44
- 版面: 廠製儀器 Factory Equipment
- 主題: Vixen, Celestron 和 Sky-Watcher 的反射鏡
- 回覆: 2
- 觀看: 2471
- 週一 18 4月, 2011 20:55
- 版面: 廠製儀器 Factory Equipment
- 主題: Vixen, Celestron 和 Sky-Watcher 的反射鏡
- 回覆: 2
- 觀看: 2471
Vixen, Celestron 和 Sky-Watcher 的反射鏡
Vixen, Celestron 和 Sky-Watcher 的 150F5/130F5 反射鏡的規格非常接近,聽說都是中國制造的。請問是否同一工廠制造?質素是否不同?
- 週四 24 3月, 2011 20:05
- 版面: 天文話題 Everything about Astronomy
- 主題: 澳門有那些觀星的好地方?
- 回覆: 4
- 觀看: 4727
- 週三 23 3月, 2011 21:29
- 版面: 天文話題 Everything about Astronomy
- 主題: 澳門有那些觀星的好地方?
- 回覆: 4
- 觀看: 4727
澳門有那些觀星的好地方?
請問澳門有那些觀星的好地方?如何去?光害情况如何?
- 週三 24 11月, 2010 16:49
- 版面: 天文活動消息 Astro Activity News
- 主題: 香港科學館普及科學講座:內空間之形--弦理論和十維空間的宇宙
- 回覆: 1
- 觀看: 1813
- 週五 13 8月, 2010 19:57
- 版面: 天文活動消息 Astro Activity News
- 主題: Anyone go to East Dam tonight? (13-August)
- 回覆: 1
- 觀看: 1642
Anyone go to East Dam tonight? (13-August)
Anyone go to East Dam tonight?
- 週三 14 7月, 2010 13:20
- 版面: 天文攝影 Astrophotography
- 主題: Cygnus (Deneb + Sadr), Lyra, Cygnus (Sadr + Gienah)
- 回覆: 24
- 觀看: 7056
From the web, I found that P2 has a restriction that prevent it to be used on focal length less than 100mm (35mm format). Does CLS has the same retriction? restriction: less than focal length 100mm,應該指裝在鏡頭之前。我諗CLS都一樣有問題。 但我的CLS係EOS clip-filter, 裝在DSLR與lens中間,這種裝法,P2或CLS都應該無>FL=100mm的限制。 不過要留意,用了cli...