I was investigating barn door trackers to do widefield stuff (with a digicam, mind you) before getting my EQ platform.
Now I just stick my camera on a tripod and put the tripod on the EQ mount. It's accurate enough for widefield stuff (under 50mm FL). Anything higher and the tracking needs to be made sure it's accurate (ie: by putting a telescope on it and do some drift aligning through the eyepiece).
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