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Focusing Question
l am rebuilding a 12" GSO Dob, Aluminium tube on an Aluminium Polar Alignable fork mount, l have noticed that some of my EP's and camera will not come to focus, can other people out there let me know what EP's or accessories they have that will not reach focus and whether it is due to infocus/outfocus problems.
l am looking for problems when using the original focuser to use as a reference point.
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