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Old 13-12-2024, 02:33 PM
Matthieu (Matt)
Visual Observer

Matthieu is offline
 
Join Date: Feb 2023
Location: French Island VIC
Posts: 84
GSO Coma Corrector in big Dob only focusing with 2" eyepieces

Hi there,
Over the last couple of years, I've slowly built up what I see as a quality midrange set of eyepieces for my 16" f/4.5 dob.

Unfortunately, only the 2" eyepieces (30mm Ultima Edge and 12.5mm Morpheus) require sufficient outward focus to work with my GSO coma corrector (no spacer installed yet).

So I'm wondering if:
1. adding a spacer to the GSO cc will change how much focuser travel eyepieces require, if so, will it require more outwards or inwards travel?
2. provided adding the spacer above doesn't change anything, am I insane to consider replacing my 1.25" eyepieces (18 Ultima Edge, 9t6 Nagler, and 7 X Cell LX) with more Morpheuses (17.5, 9 and 6.5) considering the 12.5 comes to focus with the CC

PS: I've already played with the mirror and raised it as much as I could to increase the available back focus
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