Messier 75 Globular Cluster
11-Sep-2017
Messier 75 is a dense globular cluster 65000 light years away. This test shot is the first published photo from my new 10" f/4 newtonian telescope, and it's been quite a journey to get a nice field corrected image from it. Now I wait for the new moon and a suitable target.
Image:
- 25x 120s Light pollution filter as luminance bin1x1
- 12x 120s Red bin1x1
- 12x 120s Green bin1x1
- 13x 120s Blue bin1x1
Total exposure 2 hours 4 minutes.
Hardware:
- GSO 10" f/4 newtonian
- SkyWatcher EQ8 Pro Mount
- QSI 683-ws8 Camera @ -15°C
- Teleview Paracorr II field flattener
- Astronomik Typ2 LP & RGB filters
- Starlight Xpress Lodestar X2 Autoguider
- Starlight Instruments Focus Boss II
Location:
- Orange zone in Brisbane, Australia. (Bortle 7)
- Imaged during full moon.
Software:
- CCD Autopilot 5
- The Sky X Professional Edition
- FocusMax V4
- CCDInspector: Image analysis & rejection
- CCDStack 2+: Calibrate, align, stack, deconvolution, remove gradients, combine RGB.
- Photoshop CC: Combine LP+RGB, noise reduction, curves, saturation, crop.