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Old 21-09-2013, 01:09 PM
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OzEclipse (Joe Cali)
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Join Date: Jun 2012
Location: Canberra, Australia
Posts: 948
You'll need to have a pretty good worm drive to do unguided exposures with a 200mm lens.

6.4 micron pixels @200mm is 6 arc sec/pixel

What drive do you have on your home made mount? You can get away with much bigger drive errors with shorter lenses.

Joe
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