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M17 (Sgr)
Click on the image for a larger version
| Date/Site: |
August 23th and 24th, 2011, Rifugio Monte Muro, Maurerberg, Southern Tyrol |
Exposure/
Filter: |
R: 6 x 600 seconds, G: 3 x 600 seconds, B: 3 x 600 seconds (-15°C) |
| Camera: |
SBIG ST10XME, CFW9 with SBIG LRGB-filters, AO-8 |
Optics/
Instrument: |
6"-Newton on Gemini 41 Observatory mount, RCC1 Coma-corrector |
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Focusing with Robofocus |
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Calibration, alignment and stacking: MaximDL 5.01,
Levels and curves: Photoshop CS |
This widefield-view was done at the same time with the 200mm-lens.
Some years earlier with the 300D and the 6":
M17, Omega-Nebula (Sgr)
Click on the image for a larger version
| Date/Site: |
September 13., 2007, Rifugio Monte Muro, Maurerberg, Southern Tyrol |
Exposure/
Filter: |
12 x 5 minutes |
| Camera: |
Canon EOS 300Da |
Optics/
Instrument: |
6"-Newton on Gemini 41 Observatory mount, Baader-coma-corrector |
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focusing with RoboFocus and DSLR Focus |
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webcam-guiding with MaximDSLR through 4"-FH-refractor |
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Darks: Fitswork,
aligning and stacking: MaximDSLR,
levels and curves: Photoshop CS |
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© Friedhelm Hübner, last revision: 03.12.2023