Quote:
Originally Posted by pirate of skies
If I guide a dob (alt and Azimuth) and add a wedge for my latitude, isn't this the same a an german equatorial mount ?
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Sadly no, because your tube does not rotate in the same way a tube on a GEM will. Search for "field rotation". So you are limited to shorter exposures before the stars in the edges of the field start to leave trails.