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Tube Clamp Tightening Knob Dovetail Mounting Bar Figure 2-5 8 If you wish to change the orientation of the star diagonal, loosen the thumbscrew on the eyepiece adapter until the star diagonal rotates freely. Rotate the diagonal to the desired position and tighten the thumbscrew. T TTh hhe ee E EEy yye eep ppi iie eec cce ee The eyepiece, is the optical element that magnifies the image focused by the telescope. The eyepiece fits either directly into the focuser (114mm and 130mm models) or into th