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M 20 (Trifid Nebula) in H alpha
Technical Details: |
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| Optics: | 12" ASA Astrograph at F/6.8 |
| Mount: | ASA DDM 85 |
| Camera: | SBIG STL-11000M |
| Filters: | Baader 8 nm Ha filter |
| Dates/Times: | 24 June 2011 |
| Location: | Avren |
| Exposure Details: | Ha = 60 min |
| Subexposures: | 15 minutes |
| Acquisition: | CCD Soft |
| Processing: | PixInsight, Photoshop CS |
