DSO 遺照集 -- NGC7000
Re: DSO 遺照集 -- M53 , 2nd post today
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
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
Re: DSO 遺照集 -- M13 posted today
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.
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.
Re: DSO 遺照集 -- M13 posted today
Below is one of the RAW FYI.
Re: DSO 遺照集 -- NGC5139 posted on Jan 29th
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.
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.
Re: DSO 遺照集 -- M51 posted on Jan 30th
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.
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.
Re: DSO 遺照集 -- M22 posted on Jan 31st
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
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
Re: DSO 遺照集 -- M4 posted on Feb 1st
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
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
Re: DSO 遺照集 -- M5 posted on Feb 2nd
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.
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.
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