User GuideTable of ContentsIntroduction5Unpacking5Assembly: 60mm and 70mm models5Assembly: 80mm, 90mm, 114mm, and 127mm Models7Balancing the Tube in the Mount7Attaching the Viewfinder7Focusing the Viewfinder9Aligning the Viewfinder9Observing Through the Telescope9The Focuser and the Eyepiece-Holder10Astronomical Observing10Eyepieces and Magnification10The Barlow Lens10A Note About Power11Collimation of the Telescope's Optical System11Maintenance11Questions and Repairs11Appendix 1: Optical Alignment of 114mm and 127mm Models:13Appendix 2: Telescope Control Systems15#490 Manual Slow-Motion Control set15#492 Dual-Motor Electronic Control System15To Install the #492 System15Operating Notes on the #492 Dual-Motor Electronic Control System17#493 Autostar Computer Control System18To Install the #493 System18Appendix 3: Optional Electronic and Computer Drive Systems19#490 Manual Control Set19#492 Dual-Motor Electronic Control System19#493 Autostar Computer Control System19#495 Autostar Handbox19#497 Autostar Handbox19Size: 1.22 MBPages: 20Language: EnglishOpen manual