Mikkel Kroman Posted January 11 Share Posted January 11 Hi all On Takahashi's website it says that the metal back distance is 178mm. Do I need to "hit" 178mm precisely? Or is it okay that it is not 178mm as long as I am able to reach focus with my ZEO EAF? My stars seem elongated so that is why I ask. I use a ZWO ASI1600MM Pro. Kind regards Mikkel Link to comment Share on other sites More sharing options...
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