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Vixen 80MF refractor +Achieving Focus


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I recently got a Vixen 80MF refractor with the aim of using it for guiding, anyway played around to night and really struggled to achieve focus - not sure I understand why ?

Pointers appreciated


John B

Edited by johnb
sorry wrong area - should be equip
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Hello JohnB. Have you tried a star diagonal on it yet, some of these refractors have a lot of back focus and won't work without. I've got a 80MF but having chopped 3" off it this afternoon I can't really double check for you! :)

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