Flip-mir­ror di­ag­o­nal

Sky at Night Magazine - - FIRST LIGHT -

A flip-mir­ror di­ag­o­nal unit is pro­vided. This in­cor­po­rates an in­ter­nal mir­ror moved via an ex­ter­nal knob. One po­si­tion puts the mir­ror out of the way with the fo­cus po­si­tion aligned along the tele­scope’s op­ti­cal axis. In the 45° po­si­tion, the fo­cus point is sent to a sec­ond eye­piece bar­rel at 90° to the scope’s op­ti­cal axis.

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