Quote:
Originally Posted by Tony_
There is a company in US that makes worms, worm gears etc. for specific mounts and ATM requirements (Aeroquest Machining) ... Apparently they are accurate to about 4 arc seconds peak to peak ...
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I'd be weary of those claims... Some of the best mount manufacturers out there, AP and SB, guarantee their PE to be around 7 or so, depending on the particular mount.