DSO 遺照集 -- M56

行星、深空天體、星野攝影等
LT
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Re: DSO 遺照集 -- M53 , 2nd post today

文章 LT » 週日 26 1月, 2020 19:11

9. M13

It is a big surprise that the very little galaxy can be captured with DSLR under a heavily light polluted night sky in YL area. Thanks to the very high transparency at that night. However, for a non-cooled DSLR, thermal noise is still a very big issue, if temperature > 20C. So, the RAW data will be deleted too, and look forward to taking this object with the same scope this year with cooled CMOS camera.

Taken with DIY 6" F4 Newtonian + MPCC + unmodified 1100D in Yuen Long, Hong Kong in 2013 @600mm F4
17x120s @iso800, autoguided with Vixen SXD mount
M13_6F4_1100D_iso800_17x120s_crop_YL.jpg
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Eddy So
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Re: DSO 遺照集 -- M13 posted today

文章 Eddy So » 週一 27 1月, 2020 20:33

[Good Job]

LT
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Re: DSO 遺照集 -- M13 posted today

文章 LT » 週三 29 1月, 2020 22:51

10. NGC5139 from PTC

If you have been to PTC for astronomy, you may know the window for imaging this GC is quite slim, depending on location of course. At that night on the 13th of April in 2015, I could only have about 30 min before it went into the very severe light pollution area.

Taken with Vixen VC200L + reducer + unmodified 6D @1280mm F6.4
6x240s @iso800, autoguided with Vixen SX2 mount

Hope I can re-visit it again this year with a 30cm Newtonian.
NGC5139_VC200L_6D_iso800_6x240s_20150413_PTC.jpg
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LT
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Re: DSO 遺照集 -- M13 posted today

文章 LT » 週三 29 1月, 2020 22:52

Below is one of the RAW FYI.
NGC5139_VC200L_6D_RAW.jpg
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Wongsir
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Re: DSO 遺照集 -- NGC5139 posted on Jan 29th

文章 Wongsir » 週四 30 1月, 2020 13:23

[Good Job]

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Eddy So
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Re: DSO 遺照集 -- NGC5139 posted on Jan 29th

文章 Eddy So » 週四 30 1月, 2020 15:55

[Good Job]

LT
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Re: DSO 遺照集 -- NGC5139 posted on Jan 29th

文章 LT » 週四 30 1月, 2020 22:29

11. M51

Taken with Vixen VC200L + reducer + unmodified 6D in PTC in 2015 @1280mm F6.4
1x240s @iso800, autoguided with Vixen SX2 mount

Have forgotten what reason just one frame was captured at that night. If more frames were captured, the final image should be much better. The seeing was quite good at that night.
M51_VC200L_6D_iso800_240s_20150413_PTC.jpg
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LT
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Re: DSO 遺照集 -- M51 posted on Jan 30th

文章 LT » 週五 31 1月, 2020 19:36

12. M22

Taken with Vixen VC200L + reducer + unmodified 6D in 2015 @1280mm F6.4
4x245s @iso1600, autoguided with Vixen SX2 mount

Tilting issue happened when the camera was coupled onto the wide photo adapter. Moreover, just total exposure = 4x45s, very poor sn ratio. So, RAW data need to be deleted.
M22_VC200L_6D_iso1600_4x45s_20150619.jpg
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Eddy So
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Re: DSO 遺照集 -- M22 posted on Jan 31st

文章 Eddy So » 週五 31 1月, 2020 20:23

[Good Job]

LT
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Re: DSO 遺照集 -- M22 posted on Jan 31st

文章 LT » 週六 01 2月, 2020 09:04

13. M4

Taken with Vixen VC200L + reducer + unmodified 6D in 2015 in PTC @1280mm F6.4
6x245s @iso1600, autoguided with Vixen SX2 mount

Looking forward to seeing what the result would be if it is taken with a 30cm Newtonian
M4_VC200L_6D_iso1600_6x240s_20150616.jpg
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Wongsir
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Re: DSO 遺照集 -- M4 posted on Feb 1st

文章 Wongsir » 週六 01 2月, 2020 18:16

[Good Job]

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Eddy So
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Re: DSO 遺照集 -- M4 posted on Feb 1st

文章 Eddy So » 週六 01 2月, 2020 20:03

[Good Job]

LT
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Re: DSO 遺照集 -- M4 posted on Feb 1st

文章 LT » 週日 02 2月, 2020 23:24

14. M5

Taken with Vixen VC200L + reducer + unmodified 6D in PTC in 2015 @1280mm F6.4
11x240s @iso800, autoguided with Vixen SX2 mount
Stacked in DSS with 4 darks calibrated
M5_20150415_6D_iso800_11x240s_PTC_crop.jpg
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Eddy So
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Re: DSO 遺照集 -- M5 posted on Feb 2nd

文章 Eddy So » 週一 03 2月, 2020 21:25

[Good Job]

LT
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Re: DSO 遺照集 -- M5 posted on Feb 2nd

文章 LT » 週二 04 2月, 2020 00:03

15. M13 from PTC

Taken with Vixen VC200L + reducer + unmodified 6D in PTC in 2015 @1280mm F6.4
10x240s @iso800, autoguided with Vixen SX2 mount
Stacked in DSS with 4 darks calibrated

The IC object is there, though not so obvious as the image taken with 6" F4 Newtonian in YL. It shows much better.
M13_VC200L_iso800_10x240s_crop_PS.jpg
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