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Posted 05 January 2018 - 04:42 PM
I think horizontal collimation results in inaccurate collimation but mainly for the scopes with heavier mirrors. A C8 may not show much difference but in the case of a C14, I found that collimating in the horizontal position with a HoTech CT collimator resulted in a collimation error when pointed up. I then recollimated at approximately 45 degrees which resulted in a perfect collimation.
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