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執銀河照小心得

最近也有去拍拍銀河照。為免下次拍的時候忘記如何處理銀河照,因為出動拍銀河的機會不多呢,所以還是記下來先好了。

拍攝
最盡還是長曝三十秒,否則就不是一點點的星,而是一條條的星軌的了。光圈就用到接近最大的。
自己的相片參考參數:ISO 1600 25 sec f/3.2。用較新的單鏡反光相機,應該可以開大一點 ISO。現在用的只是 500D,在高 ISO 的情況 noise 會比較嚴重,所以還是用 1600 算了。

單張處理
用 Photoshop 開啟相片的 Raw 檔,調教一下 White Blance,免得相片太黃,太紅。可以試試調教下 Highlights , Whites, Contrast ,將數值調高,Blacks 的數值調低,感覺上銀河會更為顯眼。順眼就行吧。
1

然後就開啟圖片,要再弄清楚一下銀河。複製相片的圖層,然後用 Filter > Sharpen > Unsharp Mask。Amount 及 Radius 可以調教,不要太過火就行了。然後開一個 Layer Mask,把不是銀河部分的地方擦掉,再在 Layer Mask 上弄個 Filter > Blur > Gaussian Blur ,來把 Mask 的邊緣羽化一下。調教到一個銀河主體不會模糊掉,而邊緣不會太硬就可以了。
2
可以留意下右下方不同圖層的配置。

之後再合併圖層來作其他的修改,例如改一改 contrast,把銀河弄得更為顯眼。執一執飛機的燈,這可以用印章工具來塗走相關的燈光。

3
前前後後已經大為改善了。

下方太黑又怎樣辦?可以在這銀河圖層上建立一個新圖層,放置原圖,然後去調光下面。或是重新開啟一個新檔案,在 Raw 內調光下面,然後將圖片放在該新置圖層上(這次下方調得麻麻,因為趕時間,哈。)。再弄個 Layer Mask,用漸變工具,把上面銀河要顯出來的地方塗走就行了。
4
可以留意下右下方不同圖層的配置。

最後可以看看 Raw 內的版本及執相後的版本。
f

這次弄得比較快,所以很多位置也不弄得那麼仔細了。當然怎樣修改也有不同的方法。暫時我就用過這套方法,效果覺得不錯。歡迎提供其他修圖方案。

這一頁所說的疊相效果不錯呢,簡單容易明白。可以參考下當中用 Deep Sky Stacker(DSS)的方法。暫時沒有拍平場及偏壓檔,感覺也不錯。當然應該如果可以有相關的檔案,效果應該會更佳。

風雨中抱緊自由 – 七一香港遊行 | More Than Half Million Protest to Demand Democracy in Hong Kong

面對著白皮書,中央粗暴干涉香港官治,一國兩制蕩然無存,基本法也仿似是被架空;面對著新界東北事件,議會被建制派弄得如斯田地;面對著狼生的不斷賣港;面對著將來仍是一個小圈子的特首選舉;面對著鼓勵創意,卻不容許人開台,現在仍是一台獨大,電視節目製作低劣;面對著傳媒不斷被人打壓,言論自由岌岌可危….你仍會冷待嗎?這一年的七月一日,超過五十萬的市民,走到街上,表達自己對政府種種政策的不滿,同時也爭取香港將來的是一場真普選。為何在風雨中,大家要站出來?停了在街上一大段時間,冒著酷熱的天氣,也繼續忍受下去?為何大家寧願犧牲假期,犧牲享樂,而要走到街上?為著有些東西,為著核心價值,為著香港,我想大家都不介意。希望可以喚醒更多的人 - 政治是一隻鬼,你討厭牠,沒有用,牠上門找你。 雖然現實,任何東西要變,都不可以一晚就變到,而爭取,往往要付上代價,但,希望大家要堅持,因為這段路是很漫長。

From 1 July 2014 – more than half million protest to demand democracy and say NO to many politics in Hong Kong. Hope this picture could raise awareness to more people in Hong Kong, to care about our society.

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2014 荷花 | Lotus

這次去過城門谷公園及元朗的楊家村拍荷花。可能是受到器材的限制,拍的不太美。但總算是在天色不太好的時候,的一個拍照的好主題及好去處。

藍天白雲遊塔門 | Grass island under blue sky

夏天又到。來多一次塔門。這兒夏天來雖然是比較曬,因為島上草地比較多,行人徑旁樹蔭就比較少,但是看到藍天之下,綠草如茵,近岸的水面更泛起一層層清水的綠色,彷如置身於另外一個國家的美麗海岸般。看見這些美麗自然的畫面,熱點點也是值得的!或許最近比較熱,一開始也很難發現塔門島上另外一個地標-牛群的蹤影。到了最後,見尾班船還沒有到,結果就去那塊大草地多一遍。結果,終於在這次塔門之旅也看到了他們的步蹤!嚐過秘制的冰凍咸柑桔,嚐著冰菠蘿回航,感覺是多麼的寫意。

Grass Island, or Tap Mun, is a small island situated at the north-eastern part of Hong Kong. Ferry from Wong Shek Pier at Sai Kung, or from Ma Liu Shui, is the only mode of transportation to reach this remote island.

The population on this island is small, but instead, another group of citizens – cows, boosts the popularity of this small islands. Viewing groups of cows enjoying their meals on big pieces of grasslands, enjoying their leisure in front of seas with endless edges, is a great experience for you to feel the beauty and tranquility of the nature.

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大潭篤水塘水壩。放水時 | Tai Tam Reservoir at Night

一直也想大潭篤水塘水壩放水時候的樣子。在連日的暴雨後,雨終於停下來,最終在有廣角鏡之下,加上這麼多日下雨後,水塘一定要放一放走些水。終於有機會去拍這個位置了!

Tai Tam Reservoir at Night. I have waited for quite a long time in order to capture the moment when the reservoir is full of water and some water need to be released from there! Finally I had chances to do so this year.

貝澳。十塱。東涌灣。馬灣涌之旅 | Lantau Tour (Pui O, Tung Chung)

將想去且相鄰近的地方,一日走過。其實這堆地方很容易去的,不過在烈日當空下,背著這麼重的器材,倒是有點的吃力。雖然不是甚麼的例景位,但也是很漂亮。

貝澳,不知是否這陣子太熱,牛群也沒有出沒,但看到海水在沙灘留下的潮退痕跡,感覺很美麗,彷如置身另外一個的地方。路旁的水葫蘆,雖然不是有太多,但在藍天下看,感覺很棒。期待有更多花開著的日子;十塱,拍到牛在溪中休憩,也拍到應該是大雨下,田野的積水還沒有消退,偶然營造出的藍天白雲倒影;東涌灣,潮退後的石灘,新市鎮區為背景,前方則是塊孤木,可謂是一個新舊的對比,但願這塊是當地人的樂土可以保存下來;馬灣涌,略略感受到漁村的風貌。在公共屋邨之下的漁村,風光可謂特別。可惜當日日落時分,雲層略厚,把夕陽盡都蓋著了,唯有等下次才可以把那兒的日落拍下了。

Trying to go to as many as possible places under blue sky. This time I have tried going to Pui O, Shap Long at the southern part of Lautau Island, and also Tung Chung Bay and Ma Wan Chung near Tung Chung.

It is really beautiful at the southern part of Lautau Island. The beaches are so clean and the water is so clear. Maybe on that day, it was so hot that those water buffaloes did not show up at those field near Pui O. But it was also great to see the pattern that the water left on the beach when the tide was out. Those Water Hyacinth started blossoming, and hope that I could have a chance to see more flowers blossoming there when I visit Pui O next time.

It was also great to visit Tung Chung Bay and Ma Wan Chung, as the government may want to reclaim these places and turn it into new town.

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巧遇赤柱雙彩虹 | Double Rainbow at Stanley, Hong Kong

是日本來想到大潭拍夜色下的大壩,也想先下午開始就在大潭附近看看有甚麼好東西拍。但是乘車到大潭的時候,那兒在下雨,剛巧身上又沒有帶備雨傘,於是便到赤柱去先了。甫下車,發覺天上好像有點有趣的東西,趕快跑到岸邊,啊,原來是雙彩虹!這是我的第一次拍到彩虹呢!

This is my first time to take photos of rainbow, and even double rainbows! Originally I would just stay at Tai Tam and wait to take night shots of the dam. But suddenly rain came, I did not get off the bus and went to Stanley. Surprisingly, something appeared in the sky…wow!

Secondary rainbows are caused by a double reflection of sunlight inside the raindrops, and appear at an angle of 50–53°. As a result of the second reflection, the colours of a secondary rainbow are inverted compared to the primary bow, with blue on the outside and red on the inside. The secondary rainbow is fainter than the primary because more light escapes from two reflections compared to one and because the rainbow itself is spread over a greater area of the sky. The dark area of unlit sky lying between the primary and secondary bows is called Alexander’s band.

短遊塱原拍夕陽 | Long Valley under Sunset

一直也很喜歡塱原這個地方。這兒保留著香港的農業文化,這兒也保留著濕地,讓候鳥有地方去聚居,有地方去補給,也可以在這兒生活下去。這兒也不像是濕地公園,大家是可以真的跟自然,跟當地的文化,走得這麼親近,而非隔著玻璃等去觀賞這一個自然。但有人去拍自然就有問題,看著周遭的告示,都可以看到大家為著拍攝,有時候真是破壞當地多於保護當地。例如是走進農地內拍照,弄壞了人家田野的設施,甚至聽說有些拍攝鳥類時,為著拍得好相片,而是去騷擾鳥類多於是去觀賞自然。希望大家都可以珍惜這些自然風貌及環境。這兒將來或會有著一個危機。隨著新界東北新發展區計劃的開展,這兒被劃為自然生態公園。究竟是怎樣去管理這兒,到現在仍然是一個謎。但真是不希望這兒變成另外一個天水圍的濕地公園,或是一個市鎮公園的模式去管理,而是真是讓這兒的一切,包括這兒的農業,可以繼續延伸下去,而不是趕走他們。這地的靈魂,我覺得是這兒的農業,這兒的人文,若果沒有了這一切,這兒還算是這兒嗎?

From Long Valley, near Sheung Shui, Hong Kong. I really love this place, as you could see this place is not “dead” – you could see the interaction between human, the farming activities, and also birds as it is also a piece of wetland and a place for birds to have rest and lives. Hope that this place would not “dead” due to the development of new towns. In my opinion, turning this place into something like a city park, banning all farming activities will simply kill this place. You would not see how people and birds interact, and also seems people would not have a chance to have a closer exploration with the nature, if strict rules and modern facilities are applied in this place.

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