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Old 10-06-2020, 10:32 AM
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Merlin66 (Ken)
Spectroscopy Wizard

Merlin66 is offline
 
Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 8,048
A bit drastic, but you could remove the focuser, reduce the length of the OTA by 25mm and remount the focuser.
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