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·Astronomy: Sunlit Cloud - Rainbow-OVER THE RAINBOW
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Astronomy & Telescope Astronomy: Piggyback Camera

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  Piggyback Camera Piggyback Camera: Astronomy: Piggyback Camera - THE PIGGYBACK PLATFORM

THE PIGGYBACK PLATFORM

The simplest platform is the barn-door tracker, a home-built contraption made of two wooden boards bolted to-gether. As you slowly turn the bolt, the "barn door" gradually opens up, swinging the camera from east to west across the sky.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:46:10 CST (26 reads)
(Read More... | 1014 bytes more | comments? | Piggyback Camera | Score: 0)
 

 
  Piggyback Camera Piggyback Camera: Astronomy: Piggyback Camera - GUIDING OUT ERRORS

GUIDING OUT ERRORS

When shooting with short focal length lenses (under 135 mm), you can usually turn on the drive, open the shutter, and walk away. Longer lenses, however, are more demanding, and slight irregularities in the speed of the drive must be guided out.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:45:22 CST (23 reads)
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  Piggyback Camera Piggyback Camera: Astronomy: Piggyback Camera - FILM AND EXPOSURES

FILM AND EXPOSURES

The ideal subjects for piggy-back photos are constellationg Milky Way panoramas, larger nebulas and galaxies, and comets. These are best shot with an ISO 400 or 800 film and lenses set to an aperture f/2.8 to f/4.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:43:47 CST (24 reads)
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  Piggyback Camera Piggyback Camera: Astronomy: Piggyback Camera - Alignment-PRECISE ALIGNMENT

PRECISE ALIGNMENT

 
 
  Posted by astronomy on Saturday, December 04 @ 17:13:41 CST (21 reads)
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  Piggyback Camera Piggyback Camera: Astronomy: Piggyback Camera

PIGGYBACKED CAMERA

By using an equatorial mount to track tlie stars during an exposure, you can reach deep into space and record fainter targets.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:12:46 CST (26 reads)
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