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Deep-Sky Video Astronomy

Video Astronomy. Deep-Sky Video Astronomy. Dr. Helge Binder. Presented at Frühjahrstagung of VdS in Würzburg 1999. Principles:. Lens/Telescope. Video camera with coupling lens. Frame grabber card. Image intensifier tube. Video Astronomy. AVI file. Single JPEG frames. Processed image.

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Deep-Sky Video Astronomy

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  1. Video Astronomy Deep-SkyVideo Astronomy Dr. Helge Binder Presented at Frühjahrstagung of VdS in Würzburg 1999

  2. Principles: Lens/Telescope Video camera with coupling lens Frame grabber card Image intensifier tube Video Astronomy AVI file Single JPEG frames Processed image

  3. Technical Details: Hardware: 1. Optics: Lens / Telescope 2. Cyclop 10A image intensifier (Russia, 2 Gen.) 3. Coupling lens: 55 mm F/1.4 photo lens (better is a longer focal length) 4. Video camera: Canon MV1 - MiniDV 5. Frame grabber card: Miro Video PCTV 6. Notebook: LION 120 P, 40 Mbyte RAM, 1 Gbyte HD with docking station Software: 1. Miro image acquisition software 2. Main Actor Editor (shareware) 3. Display 1.83 and CCD Camera software Ver. 1.68 (public domain) 4. Quantum Image Pro 3.5, Astra Image 1.5, Photoshop 5.0 CorelPaint 8.0 Video Astronomy

  4. M42 - Great Orion nebula 70 mm F/1.2 (No guiding - tripod) Practical Video Astronomy 202 x 1/25s 1/25s 500 mm F/5.6 (No guiding - tripod) 122 x 1/6s 1/6s

  5. M42 and Flame nebula NGT 18 F/4.5 (roughly aligned) Practical Video Astronomy 78 x 1/6s 1/12s 172 x 1/6s 1/6s

  6. Pleiades / h &  Persei 70 mm F/1.2 (No guiding - tripod) Practical Video Astronomy 252 x 1/25s 1/25s 300 mm F/4.5 (No guiding - tripod) 133 x 1/6s 1/6s

  7. M81 and M82 300 mm F/4.5 (No guiding - tripod) Practical Video Astronomy 525 x 1/6s 1/6s NGT 18 F/4.5 (roughly aligned) 117 x 1/6s 1/6s

  8. M82 and NGC 3628 NGT 18 F/4.5 (roughly aligned) Practical Video Astronomy 122 x 1/6s 1/6s 223 x 1/6s 1/6s

  9. M51 and Rosette nebula NGT 18 F/4.5 (roughly aligned) Practical Video Astronomy 315 x 1/6s 1/6s 300 mm F/4.5 (No guiding - tripod) 590 x 1/6s 1/6s

  10. Problems: Practical Video Astronomy 760 x 1/6s 960 x 1/6s 1. The left image shows the effect of an unstable battery. The image intensifier changed the image scale constantly as the battery current dropped, producing a zoom effect. 2. The left image shows an accidental and unrecognized rotation of the video camera. 3. The image of Rosette nebula, on the previous page, has a very low S/N ratio . To obtain an image with a good contrast one should increase the number of single frames to at least 2000-3000, depending on the image intensifier tube used.

  11. Conclusions: 1. Video astronomy allows not only images of solar system objects, but also deep sky imaging of low light objects as galaxies and nebulas. 2. Video imaging can be done with simple tripods, Dobsons and of course with parallactical mountings. 3. Take your desired object “online“, out of real deep sky session, without disturbing visual astronomers. 4. RGB images should be possible. Also high resolution imaging should be possible with the help of mosaic techniques. 5. One may video lots of objects in a particular session - performing image processing during the many rainy nights and days in Europe. 6. Record weak stars and minor planets without tracking. Video Astronomy

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