William Optics Guide Scope

This 50mm guide scope is designed to help your main telescope track celestial objects more accurately during long-exposure astrophotography. By locking onto a guide star, it allows your mount to make micro-adjustments, preventing star trailing in your final images.

It features a standard 1.25-inch Rotolock holder, which is compatible with most dedicated guide cameras and standard 1.25-inch eyepieces. The Rotolock mechanism provides a secure, centered connection without the marring often caused by traditional thumbscrews.

Focusing is handled via the threaded barrel, which offers 8mm of travel. You simply rotate the barrel to extend or retract the objective lens until your guide stars appear sharp on your camera sensor.

Yes, the 50mm f/4 achromatic objective lens is specifically engineered to minimize chromatic aberration, ensuring that the stars you use for guiding remain crisp and well-defined. This clarity is essential for software to accurately calculate tracking corrections.

While it is optimized for guiding, you can certainly use it as a high-quality finder scope. Keep in mind that because it uses a 1.25-inch barrel, you will need to pair it with an appropriate eyepiece to view images directly.