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Old 31-12-2017, 08:51 AM
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Merlin66 (Ken)
Spectroscopy Wizard

Merlin66 is offline
Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 8,333
My understanding is the Version 4 has new electronics (hardware) - the original V3 electronics being no longer if you lose/ damage a V3 then the only option is a V4 replacement.
The Synscan versions are to accommodate to new ALt-Az EQ designs etc.
You could check the Skywatcher site and see what's new in each version?
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