DSO 遺照集 -- NGC7000
Re: DSO 遺照集 -- Eagle from YL posted on Feb 17th
25. Eagle
Taken with Vixen AX103S + 300Da in YL in 2011 @824mm F8
12x300s @iso400
AX103S is an excellent astrograph from Vixen and can support FF sensors. Optics is in 2 groups of a triplet objective and one-element flattener at the focuser end. However, the focal ratio is 8, maybe a bit too low for imaging dim DSOs.
If that Eagle was taken in PTC, other than in YL, quite sure the result would be much better.
Taken with Vixen AX103S + 300Da in YL in 2011 @824mm F8
12x300s @iso400
AX103S is an excellent astrograph from Vixen and can support FF sensors. Optics is in 2 groups of a triplet objective and one-element flattener at the focuser end. However, the focal ratio is 8, maybe a bit too low for imaging dim DSOs.
If that Eagle was taken in PTC, other than in YL, quite sure the result would be much better.
最後由 LT 於 週四 19 3月, 2020 23:28 編輯,總共編輯了 1 次。
Re: DSO 遺照集 -- M42 with 6" newtonian
26. M42
Taken with DIY 6" F5 Newtonian + MPCC + LPS + 300Da @PTC in 2009 @750mm F5
4x240s @iso400, autoguided with SXD mount
If interested, you may compare this image with those taken with other 6" Newtonians + different coma correctors. Vixen's corrector PH on 6" F4 is the best, then Paracorr while MPCC is a great poor man's choice.
Taken with DIY 6" F5 Newtonian + MPCC + LPS + 300Da @PTC in 2009 @750mm F5
4x240s @iso400, autoguided with SXD mount
If interested, you may compare this image with those taken with other 6" Newtonians + different coma correctors. Vixen's corrector PH on 6" F4 is the best, then Paracorr while MPCC is a great poor man's choice.
最後由 LT 於 週四 19 3月, 2020 23:29 編輯,總共編輯了 1 次。
Re: DSO 遺照集 -- M51 with ED115S from TMS
27. M51 wth ED115S
5x180s + 4x240s @iso400, autoguided with SXD mount
Taken with Vixen ED115S apo refractor + 300Da in TMS in 2009 @885mm F7.7 under moon light
5x180s + 4x240s @iso400, autoguided with SXD mount
Taken with Vixen ED115S apo refractor + 300Da in TMS in 2009 @885mm F7.7 under moon light
最後由 LT 於 週四 19 3月, 2020 23:29 編輯,總共編輯了 1 次。
Re: DSO 遺照集 -- Witch broom with DED108SS from PTC
28. Witch's broom
Taken with DED108SS film astrograph + LPS + 300Da @PTC in 2008 @540mm F5
5x180s @iso1600 w/o darks, bias, flats calibrated in DSS
Taken with DED108SS film astrograph + LPS + 300Da @PTC in 2008 @540mm F5
5x180s @iso1600 w/o darks, bias, flats calibrated in DSS
最後由 LT 於 週四 19 3月, 2020 23:29 編輯,總共編輯了 1 次。
Re: DSO 遺照集 -- M45 with 6 inch Newtonian from TMS
29. M45 with 6" F5 Newtonian from TMS
Taken with 6" F5 Newtonian + MPCC + LPS + 300Da from TMS in 2011 @750mm F5
13x120s @iso1600, autoguided with SXD mount
To shoot this object, 750mm focal length is too long to an APS-C sized sensor. 500mm should be just fine.
Taken with 6" F5 Newtonian + MPCC + LPS + 300Da from TMS in 2011 @750mm F5
13x120s @iso1600, autoguided with SXD mount
To shoot this object, 750mm focal length is too long to an APS-C sized sensor. 500mm should be just fine.
最後由 LT 於 週四 19 3月, 2020 23:29 編輯,總共編輯了 1 次。
Re: DSO 遺照集 -- M45 with 6 inch Newtonian from TMS
30. M42 in Ha channel from YL
When the object was taken, it had gone down less than 40 degrees above west horizon. Transparency was quite low that the Orion constellation looked quite dim in the sky.
Taken with 6" F4 Newtonian + Vixen 0.95x corrector PH + 35nm Ha filter + 1600 mono at my YL old home place on Feb 26th of 2020 @580mm F3.8, autoguided with 4cm guiding scope + Vixen AP mount
1st image: a HDR of 5x15s, 5x60s, 5x120s and 5x240s 2nd image: 2x360s
When the object was taken, it had gone down less than 40 degrees above west horizon. Transparency was quite low that the Orion constellation looked quite dim in the sky.
Taken with 6" F4 Newtonian + Vixen 0.95x corrector PH + 35nm Ha filter + 1600 mono at my YL old home place on Feb 26th of 2020 @580mm F3.8, autoguided with 4cm guiding scope + Vixen AP mount
1st image: a HDR of 5x15s, 5x60s, 5x120s and 5x240s 2nd image: 2x360s
最後由 LT 於 週四 19 3月, 2020 23:29 編輯,總共編輯了 1 次。
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