10吋牛頓鏡下的攝影習作

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:33

近年除了積極利用鏡齡久遠的Vixen 4吋折射鏡進行全電子化的高倍月球行星攝影，疊相拍攝深空天體也成為躍躍欲試的嗜好之一。在以最盡F/355作行星攝影及F/10慢速的深空拍攝了好一段日子後，有感是時候置入新的儀器升級一下了...

考量了好一陣子，最後決定買入了一枝10吋 F/4的反射鏡，以口徑狂熱換取一鏡兩食滿足雙重用途的宏願！繼這兩個月的多次晴天，總算累積了一批以新鏡所獲的拍攝作品。雖不是甚麼令人嘩然的傑作，用作交流一下也還可以吧。

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:34

行星攝影一直也是小弟參與較多的天文攝影範疇之一，為求拍到行星表面，不知好歹的用DSLR加Barlow加目鏡達致F/355也曾試過。這一年多開始用動態天文相機，輕輕鬆鬆的以F/28已可拍到比從前來得利落分明的效果。

為求配合10吋鏡，特地加配了Powermate 5x，以F/20進行行星拍攝。看見土星光環一梳一梳的呈現出來，頗滿足啊！接下來，希望可以在大氣更穩定及光軸更準的情況下拍過痛快！

Date: June 16, 2015
Time: 00:31 (HKT)
Location: Clearwaterbay Country Park
Optical System: Skywatcher Quattro 10" F/4 Reflector + Televue Powermate 5x
Camera: ZWO ASI120MM-S
Full-frame Equivalent Focal Length: 36,000mm
Gain=63
Gamma=60
Exposure/frame= 0. 031905s (~1/31s)
Stacked 1,826 frames
Seeing: 4/10 Transparency 7/10 (1-Worst, 10-Best)
Mount: Skywatcher AZ-E Q6
Captured by Sharpcap at 640x480 16-bit SER, Stacked by Autostakkert
Processed by Registax 6 (Wavelet), Photoshop CS2 (DeNoise, Resize)

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:35

幾次觀測都是雲來雲去，偶爾在雲隙中，增取時間拍下這M8；沒有拍dark, bias及flat，但效果仍算不錯啊。下次要找個機會做足一點

Date: Jun 19, 2015
Time: 01:28 (HKT)
Location: PTC
Camera: Nikon D90 (unmodified)
Telescope: Skywatcher Quattro 10" F/4 Reflector + Baader MPCC Coma Corrector
Full frame equivalent focal length: 1500mm
Filter: Hutech LPS-P2
ISO: 1600
Exposure: 180sec x 5 = 15min
Tracked by Skywatcher AZ-EQ6, Unguided
Stacked by Deep Sky Stacker, Processed by PS CS2

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:36

很喜歡用動態相機局部的拍下月面，然後再做mosiac合拼還原一張月球照，以獲取那硬實高清的拍攝效果。

Date: Jun 7, 2015
Time: 05:12 (HKT)
Location: TKO
Optical System: Skywatcher Quattro 10" F/4 Reflector
Camera: ZWO ASI120MM-S
Seeing: 3/10 Transparency: 5/10 (1-Worst, 10-Best)
Images merged: 14
Mount: Skywatcher AZ-E Q6
Captured by Sharpcap at 1280x960 16-bit SER, Stacked by Autostakkert
Processed by Registax 6 (Wavelet), Photoshop CS2 (Photomerge)
Lunar Illumination: 80.2%

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:37

下班後匆匆回家取鏡，在極不穩定的大氣下拍下這初三的月光

Date: Jun 19, 2015
Time: 20:13 (HKT)
Location: TKO Industrial Estate
Optical System: Skywatcher Quattro 10" F/4 Reflector
Camera: ZWO ASI120MM-S
Seeing: 1/10 Transparency: 6/10 (1-Worst, 10-Best)
Images merged: 5
Mount: Skywatcher AZ-E Q6
Captured by Sharpcap at 1280x960 16-bit SER, Stacked by Autostakkert
Processed by Registax 6 (Wavelet), Photoshop CS2 (Photomerge)
Lunar Illumination: 8.8%

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:38

現在可以望遠鏡口徑換取更大的放大倍數，當然要多多進行這種漫遊式的高倍月面拍攝啊。這次所拍的是Aristoteles 及Eudoxus隕坑，可憾是光軸不夠精準，影像不夠結實

Date: Jun 7, 2015
Time: 05:09 (HKT)
Location: TKO
Optical System: Skywatcher Quattro 10" F/4 Reflector + Televue Powermate 5x
Camera: ZWO ASI120MM-S
Seeing: 5/10 Transparency: 5/10 (1-Worst, 10-Best)
Mount: Skywatcher AZ-E Q6
Image Stacked: 851
Captured by Sharpcap at 1280x960 16-bit SER, Stacked and Processed by Registax

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:39

光軸不準的哥白尼隕坑...

焦比值越低的鏡，越難精準的校正光軸；現在深深的體會到...

Date: Apr 29, 2015
Time: 00:31 (HKT)
Location: PTC
Optical System: Skywatcher Quattro 10" F/4 Reflector + Televue Powermate 5x
Camera: ZWO ASI120MM-S
Full frame equivalent focal length: 36000mm
Seeing: 4/10 Transparency: 5/10 (1-Worst, 10-Best)
Mount: Desmond Hui's Skywatcher AZ-EQ6
Image Stacked: 851
Captured by Sharpcap at 1280x960 16-bit SER, Stacked and Processed by Registax

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:39

用了較大口徑的望遠鏡，另一個較顯著的效果是，即使在拍月面上全被照亮的正光位置，反差仍是明顯的。像這個Crater Posidonius, 隕坑邊緣的線條仍頗硬實啊！

Date: Apr 29, 2015
Time: 00:17 (HKT)
Location: PTC
Optical System: Skywatcher Quattro 10" F/4 Reflector + Televue Powermate 5x
Camera: ZWO ASI120MM-S
Full frame equivalent focal length: 36000mm
Seeing: 4/10 Transparency: 5/10 (1-Worst, 10-Best)
Mount: Desmond Hui's Skywatcher AZ-EQ6
Image Stacked: 529
Captured by Sharpcap at 1280x960 16-bit SER, Stacked and Processed by Registax

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:40

作為行星攝影愛好者，這段期間當然也不會錯過拍攝金星的位相啊！

雖然光軸仍未夠準、加上小弟拍攝LRGB的技術仍未到位，令成像一般。但不知是否錯覺，在圖上金星8點位，好像也隱約見金星大氣雲層上的光暗反差啊！下次調好光軸後有望可以進一步引證一下！

Date: Jun 19, 2015
Time: 00:17 (HKT)
Location: TKO Industrial Estate
Optical System: Skywatcher Quattro 10" F/4 Reflector + Televue Powermate 5x
Camera: ZWO ASI120MM-S
Full frame equivalent focal length: 36000mm
Seeing: 3/10 Transparency: 5/10 (1-Worst, 10-Best)
Mount: Skywatcher AZ-EQ6
Image Stacked: 529
Captured by Sharpcap at 1280x960 16-bit SER, Stacked and Processed by Registax

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:41

想看看鏡的解像力，特地拍了一次M4。星團內的星點都算可明顯分解啊！

Date: Jun 16, 2015
Time: 01:11 (HKT)
Location: Clearwaterbay Country Park
Camera: Nikon D90 (unmodified)
Telescope: Skywatcher Quattro 10" F/4 Reflector + Baader MPCC Coma Corrector
Full frame equivalent focal length: 1500mm
Filter: Hutech LPS-P2
ISO: 1600
Exposure: 60sec x 6 = 6min
Tracked by Skywatcher AZ-EQ6, Unguided
Stacked by Deep Sky Stacker, Processed by PS CS2
Dark Frames applied

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:43

開壇拍Deep Sky，星系當然少不了。M101，9等光。

當晚的極軸還算對得準，Unguide 拍了超過半小時，還可以啊。遺憾因時間關係，沒有拍Flat...

Date: Jun 16, 2015
Time: 23:08 (HKT)
Location: PTC
Camera: Nikon D90 (unmodified)
Telescope: Skywatcher Quattro 10" F/4 Reflector + Baader MPCC Coma Corrector
Full frame equivalent focal length: 1500mm
Filter: Hutech LPS-P2
ISO: 1600
Exposure: 60sec x 32 = 32min
Tracked by Skywatcher AZ-EQ6, Unguided
Stacked by Deep Sky Stacker, Processed by PS CS2
Dark, Bias Frames applied

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:43

暫時仍未拍得滿意的木星照。

這張直焦低倍木星照是在我家的露台拍攝，拍的時候還打開了露台門，室內卻在開冷氣，影像浪到震。還拍到紋帶及木衛，都還算有點安慰。

Date: May 14, 2015
Time: 20:56 (HKT)
Location: TKO
Optical System: Skywatcher Quattro 10" F/4 Reflector
Camera: ZWO ASI120MM-S
Full frame equivalent focal length: 7200mm
Gain=0
Gamma=50
Exposure/frame= 0.004022s (~1/250s)
Seeing: 2/10 Transparency: 5/10 (1-Worst, 10-Best)
Mount: Astro LN Mount with Vixen SD-1 & MT-1
Image Stacked: 94
Captured by Sharpcap at 640x480 16-bit SER, Stacked and Processed by Registax

maverickroy · 文章由 **maverickroy** » 週六 27 6月, 2015 12:44

初試LRGB拍攝土星，成像就不合格了，但顏色都算順眼啊。會繼續苦練LRGB拍攝法

Date: May 14, 2015
Time: 20:56 (HKT)
Location: TKO
Optical System: Skywatcher Quattro 10" F/4 Reflector
Camera: ZWO ASI120MM-S
Full frame equivalent focal length: 7200mm
Gain=0
Gamma=50
Exposure/frame= 0.004022s (~1/250s)
Seeing: 2/10 Transparency: 5/10 (1-Worst, 10-Best)
Mount: Astro LN Mount with Vixen SD-1 & MT-1
Image Stacked: 94
Captured by Sharpcap at 640x480 16-bit SER, Stacked and Processed by Registax

Eddy So · 文章由 **Eddy So** » 週六 27 6月, 2015 12:49

很好的分享！

anyone · 文章由 **anyone** » 週六 27 6月, 2015 13:13

一鏡兩食

香港天文論壇

10吋牛頓鏡下的攝影習作

10吋牛頓鏡下的攝影習作

誰在線上