M16 , M17 and Helix nebulae
香港近日難得有極好天氣，趁機跑到市郊攝下幾個DSO。攝星技巧不高，作品水準平庸，期望多多指導。 yct42.gifM16 : canon 450D (mod.) , sky90 + 0.8x reducer , ISO 400 , 180sx 12 , P2 filter , EM-11 , guided by SG4 , stacked by DSS .
M17 : canon 450D (mod.) , sky90 + 0.8x reducer , ISO 400 , 180sx 12 , P2 filter , EM-11 , guided by SG4 , stacked by DSS .
Helix nebulae : canon 450D (mod.) , sky90 + 0.8x reducer , ISO 400 , 180sx 12 , P2 filter , EM-11 , guided by SG4 , stacked by DSS . 有图有真相！::070821_19.jpg:: LZ很礼貌 很谦虚::070821_04.jpg:: 香港的同胞啊幸会哟 可为什么“M16 : canon 450D (mod.) , sky90 + 0.8x reducer , ISO 400 , 180sx 12 , P2 filter , EM-11 , guided by SG4 , stacked by DSS .
M17 : canon 450D (mod.) , sky90 + 0.8x reducer , ISO 400 , 180sx 12 , P2 filter , EM-11 , guided by SG4 , stacked by DSS .
Helix nebulae : canon 450D (mod.) , sky90 + 0.8x reducer , ISO 400 , 180sx 12 , P2 filter , EM-11 , guided by SG4 , stacked by DSS .”不用下中文 有点懵了 拍的漂亮！看来香港拍摄地的光污染情况还好。 有钱人啊,........................ 作品很好 该有的效果都有了 什么时候教大家两招啊 我们很有愿意学习的啊 香港天文论坛 注册了不给审核通过啊。::070821_05.jpg:: 拍的漂亮。。。。。。。。。。 LZ 再獻 高橋美圖, 感恩啦~
不知攝影地點 [市郊] 是指哪???
我隨便亂猜下... 太平山? 還是在 大塘???
::070821_18.jpg:: 回复 1# anyone
此外看看參數... 這 P2 filter , MS 是 LZ 新入的濾片...
請問是 何牌的東東? 介紹下吧~
::070821_14.jpg:: LZ 再獻 高橋美圖, 感恩啦~
不知攝影地點 [市郊] 是指哪???
我隨便亂猜下... 太平山? 還是在 大塘???
::070 ...
edward0102 发表于 2011-7-8 09:59 http://www.astronomy.com.cn/bbs/images/common/back.gif
我應該感恩閣下才對，感謝閣下容許小弟的平庸作品上載於此專欄。 yct42.gif
攝星地點是新界西貢北潭涌，該處可說是全港最方便的攝星地點，駕私家車可以直接到達。天氣好的話，可以目視四等星左右，以香港環境來說，算是不錯了！ :) 回复anyone
此外看看參數... 這 P2 filter , MS 是 LZ 新入的濾片...
請問是 何牌的東東? 介紹下吧~
:: ...
edward0102 发表于 2011-7-8 10:03 http://www.astronomy.com.cn/bbs/images/common/back.gif
P2 filter 是光害濾鏡, 全名LPS - P2filter , 請參考：
http://www.tan14.com/IDAS.htm
http://www.sciencecenter.net/hutech/idas/lps.htm 回复 7# slice
小弟是初入門的，不敢當，大家研究研究可以了！ :) ::070821_21.jpg::令人羡慕的照片 回复 13# anyone
原來是和 Peter 買的...
看來這東西 不錯... 那我就轉載下, 好讓同好 看看使用上的差異...
Light Pollution Suppression (LPS) Filters
Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae (see filter plots).
Unlike other light pollution suppression filters, IDAS filters are specifically designed for balanced color transmission using the IDAS unique Multi-Bandpass Technology (MBT) process. The balanced transmission allows color photographs to be taken with minimal color cast to broadband emission objects such as stars, galaxies and globular clusters. The comparison photos at right demonstrate (qualitatively) that the IDAS filter maintains better color balance than other filters which have been designed for visual use.
See also comparison film astrophotos (Set 1 and Set 2) which demonstrate the actual effect of the LPS filter.
LPS filters utilize the unique IDAS Ion Gun Assisted Deposition (IGAD*) coating technology for superior coating durability (quartz hardness) and safer cleaning. IGAD coatings also improve temperature and humidity stability of the filter performance, reducing spectrum shifts down to +/-1nm from the +/-3 or 4nm shift of standard coatings.
http://www.sciencecenter.net/hutech/idas/pics/compare0.jpg
CCD imaging can also benefit, because although CCD imagers can already shoot through light pollution to some extent, including an LPS filter to the setup gives an added (signal-to-noise) edge as shown in these CCD examples (comparison testing by G. Tomita in Tokyo). 我應該感恩閣下才對，感謝閣下容許小弟的平庸作品上載於此專欄。
攝星地點是新界西貢北潭涌 ...
anyone 发表于 2011-7-8 21:33 http://www.astronomy.com.cn/bbs/images/common/back.gif
anyone 兄 客氣~
這地點我雖沒去過, 但聽您介紹: 交通上便利, 又有目視四等的
環境實力 (可用 filter 克服), 就很 令人心動 了...
::0020:: ::070821_07.jpg::LZ别在勾引我了
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