Visual back for ETX scopes and C90 Orange Tube
Description
This Was Made After I Was Pointed To A Post On Reddit, After Doing Some Searching, I Found The Back Port On The Etx And C90 Is Mostly The Same. (For Reference, Roughly A Non-Metric 1 3/8 Inch X 24 Tpi Thread.) After A Few Quick Revisions, This One Works Mostly On Both. (The Threads Are Almost The Same, With The C90 Having A Tiny Bit Larger Diameter On The Threads, So Play Around With The Etx_Thread_Extra_Clearance And Depending On Your Printer, There'S The Eyepiece_Extra_Clearance. (Some Eyepieces Work With 0.2, Others Require Larger Values. Almost Certainly Printer Dependent.) The First Few Times It May Be A Bit Annoying To Get On. Don'T Force It Too Much. It Cleans Up After A Few On And Off Cycles. This Uses Dan Kirshner'S Threads.Scad.
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