Optical Design     Parabolic Newtonian Reflector            Optical Diameter     150 mm            Focal Length     750 mm            F/Ratio     F/5            Highest Practical Power     300x            Faintest Steller Magnitude     13            Finder Scope     6x30*            Focuser Diameter     2" dual speed cryford            Eyepieces     2"-28 mm            Tube Weight     6 kg            Tube Dimensions     182mmx690mm          Product Features       The Sky-Watcher BKP 150 OTAW Dual Speed incorporates superb mirror-set with two significant advantages. A Dual-Speed 10:1 ratio focuser is now included for excellent focusing precision. Also, the tube length has been slightly shortened to optimize performance for prime-focus photography. Even better performance for astrophotography and visual use can be achieved when used in combination with Sky-Watcher’s Newtonian coma corrector.    The heavy-duty and portable EQ3 mount features 360-degree worm-gear tracking controls on both axes, large knob-style R.A. and Dec. lock bolts, dual metal setting circle dials, a latitude adjustment screw, and a built-in polar scope holder. It can be fitted with both single and double axis motor drive for auto-tracking.          SOFTWARE & FIRMWARE   MANUAL