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M 4 : globular cluster in Scorpius
Technical Details: |
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| Optics: | 12" ASA Astrograph at F/6.8 |
| Mount: | ASA DDM 85 |
| Camera: | SBIG STL-11000M |
| Filters: | Astronomik LRGB filters |
| Dates/Times: | 6 August 2011 |
| Location: | Rozhen |
| Exposure Details: | R = 20 min., G = 20 min.,B = 20 min. |
| Subexposures: | 5 minutes |
| Acquisition: | CCD Soft |
| Processing: | PixInsight, Photoshop CS |
