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with StellaCam EX by Jim Ferreira, Livermore CA-USA BakerSt@comcast.net http://www.lafterhall.com/astro.html |
| The StellaCam is an amazing integrating video
system introduced by Adirondack Video
Astronomy in the fall of 2001. The camera allows the real time
viewing and imaging of deep sky objects without the need for image intensifiers.
In the "sense up" mode the camera can integrate 2 to 128 video frames,
building up an image brighter and with more information than any single
frame. The latest version of the camera, introduced in March 2002,
the StellaCam-EX utilizes a Sony EXview HAD CCD chip which is twice as
sensitive as the original StellaCam in the visual spectrum and four times
more sensitive in the far-red and near infrared. [check
Side by side comparison of EXview and standard
HAD CCD
The camera weighs less than a premium 2 inch wide field eyepiece, measuring roughly 2 1/4" x 2 1/4" x 4 inches. A single cable connects to the camera back from the separate control box. The control box includes, along with the 5 momentary push buttons to control the camera, a BNC connector for composite video-out, a Y-C video-out and a receptacle for the 12VDC power for the camera. Optional cabling will allow the camera to be operated up to 100 feet away. All of the cabling is 95% shielded. Camera resolution is 600 horizontal lines @ 60 fields/second (NTSC) and total pixels is 811(H) x 508 (V). An on-screen display is used to adjust camera settings with the 5 push buttons on the control box. Settings include manual and auto shutter (1/60 - 1/120,000), manual and auto gain, a 2x zoom function, and, a number of additional features like viewing a negative image, inverting the image and masking selected areas of the CCD. Gamma is set at 0.45. So what can you see? Globular clusters are dazzling with a 6 inch scope and fill the video monitor with stars with 10 inches of aperture. Galaxies, such as M82 are brightly displayed and full of detail, bright knots and dark lanes, not typically seen visually in the largest amateur scopes. The camera essentially, and conservatively, increases the effective aperture of the telescope 200% to 400% depending upon sky conditions. 18th magnitude stars are within reach of a 10 inch scope in urban light polluted skies! And, an amazing 16.8magnitude (so far!) is within reach of a 6 inch aperture telescope. Below is a small, but growing collection of images made with the StellaCam-EX. Telescopes used include a 15cm f/10 Maksutov-Cassegrain, a 25cm f/6 Newtonian, a 80mm f/5 refractor and a 50mm f/2 cine lens. All video is shot from my suburban home in very light polluted Livermore, California. Video is recorded with either a Hi8 camcorder, digitized with a Snappy frame grabber, or captured directly to computer with a PixelSmart 512-8 frame grabber. Frames are stacked with RegiStax and processed with Adobe Photo Shop. |
| Supernova Remnant | |
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| Globular Clusters | |
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| Planetary Nebulae | |
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| Galaxies | |
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| Nebulae | |
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| Galactic Clusters | |
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| Observational Projects | |
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| Planets | |
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| Lunar | |
