William Optics Guide Star Refractor

This guidescope is optimized for telescopes with focal lengths between 700 mm and 1200 mm. If your main imaging telescope falls within this range, the 360 mm focal length and f/5.9 ratio will provide the precise tracking performance you need.

Yes, it comes as a complete kit. You get the guidescope itself, CNC-machined tube rings with a handle, and a Vixen-style dovetail, so you can attach it directly to your existing telescope setup right out of the box.

Focusing is managed through an adjustable dew shield and a locking ring mechanism. This design allows you to achieve sharp focus easily and lock it in place to prevent any accidental shifting during long imaging sessions.

While often associated with main imaging telescopes, using premium Ohara FPL-53 glass in a guidescope ensures high-contrast, color-corrected views. This optical quality helps your autoguiding software lock onto stars more reliably, leading to more accurate tracking.

The extension tube provides extra back-focus distance, which is essential for reaching focus with various camera configurations. It ensures you have enough travel to accommodate different guide cameras without needing additional adapters.