DSO 遺照集 -- Eta

[Eddy So]

[LT]

152. Horse Head in Ha @6nm bandwidth

Tried again on shooting Horse Head in Ha with much narrow bandwidth than that of the last attemp.

Taken with DIY 6" F4 Newtonian + Vixen corrector PH + 1600MM in YL last night @570mm F3.8
Ha = 10x360s @6nm bandwidth, autoguided with Vixen SXD2 mount
Bias, unmatched dark and flat calibration in PI

FB_HH_20220128_6F3-8_Ha_10x360s_HT.jpg (548.87 KiB) 已瀏覽 2823 次

[Eddy So]

[LT]

153. M57

This M57 is a combination of L data taken with 1600MM and color data taken with 100Da in Hong Kong both.

L= 100x30s, only dark calibration in DSS, autoguided with AXJ mount
DIY 30cm F4 Newtonian + Vixen 1.4x extender PH + LPS + 1600MM in Yuen Long in Hong Kong @1680mm F5.6, taken in 2020

Color data = 7x180s @iso400, unmatched dark and bias calibrated in PI, autoguided with AXD mount
DIY 30cm F4 Newtonian + TV paracorr + LPS + 100Da @PTC in Sai Kung in Hong Kong @1380mm F4.6, taken in 2015

Maybe the result will be a bit better if the color data is taken with a cooled OSC or even much better by taking RGB channels separately.

FB_M57_LRGB_PS.jpg (1.27 MiB) 已瀏覽 2688 次

[Eddy So]

[anyone]

[LT]

Thanks Eddy and anyone

[LT]

154. M8 taken with EF400mm F5.6L

Taken with EF400mm F5.6L + 40Da in Coonabarabran in 2013 @F5.6
6x600s @iso800 with dark only calibrated in PI
Processed in PI and PS

Very unfortunately, optical performance of this lens for wide field deep sky imaging at wide open is quite disappointing.

M8_20130827_iso800_6x600s_Coon.jpg (1.31 MiB) 已瀏覽 2554 次

[Eddy So]

[LT]

155. Wide field M42

Taken with Vixen FL55SS + HD reducer kit + LPS + 100Da in YL on Feb 22nd last week @235mm F4.3
77x45s @iso800, bias, dark and flat calibrated in PI
Bortle 8-9/10, transparency = 6/10
Autoguided with Vixen AP mount
Processed in PI and PS

Processed image

FB_M42-HH_FL55SS_F4-3_100Da_YL.jpg (1.25 MiB) 已瀏覽 2399 次

One sub (exported from Canon Digital Photo Professional with any processing in PS) for reference

FB_IMG_9911.jpg (96.71 KiB) 已瀏覽 2399 次

[Eddy So]

[LT]

Reprocessed but without any HDR applied.

FB_M42-HH_no-HDR.jpg (1.3 MiB) 已瀏覽 2364 次

[Eddy So]

[LT]

156. LMC

Taken with EF100mm F2.8L + 100Da in 2017 in Moree @F4
2x180s @iso1600, with dark and flat calibrated in DSS
Unguided with Vixen AP mount
Reprocessed in PI and PS

LMC_20170417_EF100mmL_F4_100Da_iso1600_2x180s_Moree.jpg (1.45 MiB) 已瀏覽 2156 次

[Eddy So]