Solomark F50 50mm Guidescope 190mm Focal Length， F/3.4 Focal Ratio， Fully Coated w/ Helical Focuser[Product Information]- Enter your model numberto make sure this fits.
- 50mm guide scope with bright， wide-field optics puts numerous potential guide stars in view so you'll never have to search for one!
- Very small and compact autoguiding system adds hardly any weight to an astrophotography setup and can conveniently be stashed in an accessory case between uses
- Compact mini guide scope designed for use with astrophotography telescopes up to 1500mm focal length
- Quick focus retractable tube with 1mm scale， can be locked in place. Precision non-rotating micro-focuser with 1/10mm scale.
- Fits standard Celestron， Skywatcher， Vixen & GSO type saddles.43mm focusing range (10mm focusing range with micro-focusing Helical focuser， the rest is by a fixable， scaled drawtube).
