Quote:
Originally Posted by RickS
I built a barn door tracker back in the days of film cameras. Much easier to get good results with a DSLR 
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Yup!
Photo of my old hand cranked film-era barn door here:
http://www.iceinspace.com.au/forum/s...9&postcount=14
Was over engineered with wooden tripod, alt-az adjustments for polar aligning and a mod to double exposure lengths. But it did the job. The ball head was cheap and nasty tho.