10吋牛反的深空天體雜作 (新增 馬頭 -2016.2.13)

[maverickroy]

從前我比較喜愛月球行星攝影，貪其唔使點guide，快靚正；而且所持的長焦鏡又不適合影深空，DSO拍攝在那時並不是小弟杯茶。

自從這兩三年重啟了夜出作天文拍攝的興趣，見證同好們拍得瑰麗的DSO佳作，不禁也要跳進這深而廣的DSO火坑...

這個DSO拍攝旅程，慢慢長路啊！看看以下小弟的step-by-step to-do list, 有多麼東西要學習：

- auto-guiding
- pi
- HaRGB
- CCD imaging
- HaSIIOIIIRGB

~不得了啊！

不過，before all that，我發現，就如很多前輩所說，原來平場真的非常重要！

早前的起心肝留待至天明時正正經經地拍下一輯flat（暫時仍被pi的所謂steep learning curve嚇怕，未能使用DBE大法），近日才把這批flat再stack一次，效果好了一點啊！

幾張劣作，給大家品評一下　:)


M42 with HDR processing using Photoshop layers
按網上教學的方式，把上次不同曝光的M42來個人肉layer mask HDR 疊圖。可能曝光不夠，走佬人出不來...下次再花多一點時間拍M42吧！

Date: Dec 18 , 2015
Time: 02:51 (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:
5s x 4 = 20s
10s x 4 = 40s
20s x 6 = 120s
30s x 4 = 120s
60s x 1 = 60s
90s x 1 = 90s
120s x 1 = 120s
Tracked by Skywatcher AZ-EQ6, Unguided
Stacked by Deep Sky Stacker, Processed by PS CS2
Dark, Bias, Flat Frames applied

[maverickroy]

M8
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
Dark, Bias, Flat Frames applied

[maverickroy]

M101
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, Flat Frames applied

[maverickroy]

Leo Triplet (M65, M66, NGC3628)
Date: Dec 18, 2015
Time: 03:37 (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 6 = 18min
Tracked by Skywatcher AZ-EQ6, Unguided
Stacked by Deep Sky Stacker, Processed by PS CS2
Dark, Bias, Flat Frames applied

[wtyu21]

多謝師兄當晚借出螺絲批給我解決NexGuider導星器電源線鬆脫問題；亦有幸透過你的十吋大牛觀看到暗綠色的M42和四合星～大飽眼福！

[bbyaya]

正 beautiful
用你隻大牛目視木星好鬼正
我都努力緊疊相

[anthony168]

M8很美

[LT]

用大牛牛拍深空，真不容易，我明的。看來牛牛的光軸要搞一番呢(希望不是鏡面質素問題)。

[maverickroy]

多謝師兄當晚借出螺絲批給我解決NexGuider導星器電源線鬆脫問題；亦有幸透過你的十吋大牛觀看到暗綠色的M42和四合星～大飽眼福！

不用客氣!最緊要有得影!

[maverickroy]

正 beautiful
用你隻大牛目視木星好鬼正
我都努力緊疊相

佐冶兄, 快D出圖

搵晚睇埋月球

[maverickroy]

M8很美

謝謝賞圖, Anthony兄

[maverickroy]

用大牛牛拍深空，真不容易，我明的。看來牛牛的光軸要搞一番呢(希望不是鏡面質素問題)。

LT, 是啊, 可能光軸仍有些偏。次次setup都搞成個幾鐘真是有點浪費保貴的晴天時間

估計鏡面光學ok 啩, 上次影高倍月球同土星都尚算ok , 不過果次set光軸都用了很長時間...

[maverickroy]

M51, IC 4263, NGC 5198 & NGC 5169

猴年假期一連幾日晴天，奈何行程緊密，只有年廿八可以走出來拍攝。當晚風大，鏡常被風吹郁，近半的light frame也被吹至拉線而不能用...

這張M51，前後用了1.5小時拍攝，22張light frame只有17張能用...算，照疊...

今次是小弟第二次影M51，上次用f/10的4吋折射鏡影了34分鐘，作品暗到唔見得人。今次不用太多圖像處理，星系的藍已可以清楚呈現，頗滿意啊！

另一個驚喜位，是這次作品也一拼拍到14.5等的IC 4263棒旋星系、11.8等的NGC 5198橢圓星系及13.5等的NGC 5169棒旋星系

Date: Feb 7, 2016
Time: 01:57 (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: 90sec x 17 = 25min 30sec
Tracked by Skywatcher AZ-EQ6, Unguided
Stacked by Deep Sky Stacker, Processed by PS CS2
Dark, Bias, Flat Frames applied, Image cropped

[wtyu21]

大風使得我WO 70ED小鏡拍馬頭20幅只有一半左右可疊～

[bbyaya]

正呀，你隻大牛分辨率很高，好detail