忽發奇想講日食

[SiuSiu]

真係睇到我心花怒放！

[johncamposhk]

一時之間塞咁多野入腦有排睇了

[David]

非常正的分享。我好同意要練習練習。

我有少少其他意見: 焦距太長便要對極更準，未必影到外圍日冕，赤道儀和技術的要求又較高，對第一次玩日食或技巧普通的人未必適合。我上年用Sky 90+ flattener (焦距=414mm)，對相片要求一般的人影出來都好夠大。由於焦距不太長，用很輕便的赤道儀便可以了。

如果只帶普通相機腳架和雲台，不帶赤道儀或其他有追蹤的地平式腳架，其實都可以影鑽石環和近太陽表面的日冕，因為曝光時間好短，約數百分一秒 (如果用f/4.5, ISO100, Canon 40D)。

一些上年的數據給大家參考：

鑽石環: jpeg, f/4.5, 1/400s, ISO100, 3.5fps (練習時發現RAW連拍影十多張便慢下來，所以用jpeg。這也顯示練習的重要。)

日冕: RAW,f/4.5, ISO100, 首先影1/30s看看日冕構圖是否正確，然後由1/30s – 1/4000s每個曝光影1張 (每個曝光影多幾張當然更好，可以之後疊加)。

[johncamposhk]

i think i will bring my Bino 15x70 and a canon dslr with some len
400 70-200 etc and 1.4x no astro mirrior
^^

[Subaru]

很寶貴的分享, 由其係這麼獨到的經驗.

[SiuSiu]

感謝分享~~

非常正的分享。我好同意要練習練習。

我有少少其他意見: 焦距太長便要對極更準，未必影到外圍日冕，赤道儀和技術的要求又較高，對第一次玩日食或技巧普通的人未必適合。我上年用Sky 90+ flattener (焦距=414mm)，對相片要求一般的人影出來都好夠大。由於焦距不太長，用很輕便的赤道儀便可以了。

如果只帶普通相機腳架和雲台，不帶赤道儀或其他有追蹤的地平式腳架，其實都可以影鑽石環和近太陽表面的日冕，因為曝光時間好短，約數百分一秒 (如果用f/4.5, ISO100, Canon 40D)。

一些上年的數據給大家參考：

鑽石環: jpeg, f/4.5, 1/400s, ISO100, 3.5fps (練習時發現RAW連拍影十多張便慢下來，所以用jpeg。這也顯示練習的重要。)

日冕: RAW,f/4.5, ISO100, 首先影1/30s看看日冕構圖是否正確，然後由1/30s – 1/4000s每個曝光影1張 (每個曝光影多幾張當然更好，可以之後疊加)。

[Eddy So]

請問各位，Nikon Coolpix 4500（目鏡後拍攝）適宜拍攝日蝕嗎？

[PaulNg]

有兩個考慮:
1)　焦距夠唔夠短去影全個太陽+日冕?
2)　經過多重光學系統，　大大增加內反射發生的機會

[Eddy So]

有兩個考慮:
1)　焦距夠唔夠短去影全個太陽+日冕?
2)　經過多重光學系統，　大大增加內反射發生的機會

第一個問題我並不擔心，可以第二個問題我就有一點疑慮，因為我始終未有看過日全蝕的經驗，內反射的問題就不知如何可測試得到。

[David]

內反射的問題就不知如何可測試得到。

May be you can try this. Shoot a very very bright object at night. e.g. a bright street lamp or a bright halogen lamp at home. Choose an exposure that will overexpose the lamp. (The diamond ring is over-exposed anyway.) Then check the image to see if you are those flares caused by internal reflection.

[KingArthur]

請問各位，Nikon Coolpix 4500（目鏡後拍攝）適宜拍攝日蝕嗎？

Strongly don't recommend this method, it won't cost much to get a camera adapter for your DC.

[Eddy So]

請問各位，Nikon Coolpix 4500（目鏡後拍攝）適宜拍攝日蝕嗎？

Strongly don't recommend this method, it won't cost much to get a camera adapter for your DC.

如果是配合有M28螺牙的目鏡，那是否應該可以？

[KingArthur]

Sounds OK, I did use the similar way to shoot the Sun with my old coolpix 5000 and it worked, but shooting the eclipse could be total different, especially when you try to capture the diamond effect which last only in blinks of second, DC might fail to react fast enough, so personally I'll suggest if possible get a DSLR for better result.
Of course I could be wrong again, you have to field test it to tell.

[Eddy So]

內反射的問題就不知如何可測試得到。

May be you can try this. Shoot a very very bright object at night. e.g. a bright street lamp or a bright halogen lamp at home. Choose an exposure that will overexpose the lamp. (The diamond ring is over-exposed anyway.) Then check the image to see if you are those flares caused by internal reflection.

多謝你的意見！ [跪拜禮]

[Eddy So]

Sounds OK, I did use the similar way to shoot the Sun with my old coolpix 5000 and it worked, but shooting the eclipse could be total different, especially when you try to capture the diamond effect which last only in blinks of second, DC might fail to react fast enough, so personally I'll suggest if possible get a DSLR for better result.
Of course I could be wrong again, you have to field test it to tell.

除了DC拍照外，我還考慮拍攝VIDEO，但正在研究“平靚快易輕正”方案，希望可以完全捕足整個日全蝕便是最好了。