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PHOTOGRAPHIC TECHNIQUES

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PHOTOGRAPHIC TECHNIQUES

The easiest technique (though it requires an equatorial mount) is called Piggyback photography. The camera, with its associated lens, is attached to a bracket on the back of the scope, and the shutter is opened for a desired period while the telescope is tracking the movement of the object as the Earth turns. Obviously, this requires that the telescope be driven by a motor to follow the stars. It is the only way to get extremely widefield photography of large parts of the sky (such as the center of the Milky Way, or a full constellation).

Many objects are too small to be seen this way, though, so there is another basic technique called Afocal photography—essentially, shooting through the eyepiece. Using an inexpensive bracket to hold the camera, the camera is moved to a position where it sees the same field of view as the eyepiece. This is called Afocal because the position of the camera behind the eyepiece does not determine the focus of the image, only the size of the field of view seen. This type of photography is great for catching pictures of the Sun, Moon, and planets.

Lastly, there is the technique of longer-duration pictures of most objects in the sky, such as galaxies and nebulae, called Prime Focus photography. The camera is attached directly to an adapter (without the camera’s lens) which is attached or inserted into the telescope. In essence, the telescope has been turned into a very long focal length telephoto lens. This is the preferred technique for shooting star clusters, nebulae, comets, and other galaxies.

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IMAGING SOURCE CCD DIGITAL CAMERAS

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Imaging Source FireWire CCD Color Camera, 1/2  inch CCD, 1280 x 960 pixels, 15 images/s
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Imaging Source DBK21AF04.AS CCD Astronomy Camera FireWire Color 1/4" No IR Cut, 640X480, 60 images/s
 
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Imaging Source FireWire CCD Color Camera, 1/2  inch Sony CCD, progressive scan, 1280x960 pixel, 15 images/s
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Manuf. No. Imaging Source DFK41AF02.AS

Imaging Source DFK41AF02.AS, FireWire CCD Color Camera, 1/2 " Sony CCD, progressive scan, 1280x960 pixel, 15 images/s
 
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Imaging Source FireWire CCD Color Camera, 1/3  inch Sony CCD, progressive scan, 1024x768 pixel, 30 images/s
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Imaging Source DFK31AF03.AS, FireWire CCD Color Camera, 1/3 " Sony CCD, progressive scan, 1024x768 pixel, 30 images/s
 
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Imaging Source FireWire CCD Color Camera, 1/4  inch Sony CCD, progressive scan, 640x480 pixel, 60 images/s
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Manuf. No. Imaging Source DFK21AF04.AS

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Imaging Source FireWire CCD Monochrome Camera, 1280x960 pixel, Up to 15 images/s
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Manuf. No. Imaging Source DMK41AF02.AS

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Imaging Source FireWire CCD Camera, Monochrome 1024x768 pixel, Up to 30 images/s
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Imaging Source DBK 51AU02.AS, Color CCD Camera, 1/1.8 inch
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Imaging Source DFK51AU02.AS CCD Camera, Color, 1/1.8", IR Cut Filter
 
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Imaging Source USB Sony Color CCD Camera without IR Cut Filter with 60 images/s, 640x480
Order delivery: 6-8 weeks from date of order.  No lens included.
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Manuf. No. Imaging Source DBK 21AU618.AS

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Imaging Source DFK 21AU618.AS CCD Color Camera, USB with 60 fps, Sony Astronomy, 640x480 Order delivery: 6-8 weeks from date of order. No lens included.
 
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Manuf. No. Imaging Source DMK21AU618.AS

Imaging Source DMK21AU618.AS CCD Camera, USB High Speed Astronomical Monochromes Sony 640x480 Order delivery: 6-8 weeks from date of order. No lens included.
 
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