Sky-Watcher Flattener for ED50

The Sky-Watcher 50mm ED Guidescope (Evoguide ED50) is a versatile optical instrument designed to enhance your astronomical observations with exceptional precision. Equipped with premium ED lenses and a 50mm diameter, this low-dispersion scope offers unparalleled clarity, making it an ideal choice for both finding and guiding celestial objects. Its standout feature is its dual functionality; thanks to a versatile 31.8mm ring focuser, you can seamlessly switch between using it as a high-quality finder or a dedicated guide telescope to suit your specific observation needs.

For those interested in high-quality astrophotography, the Evoguide ED50 offers seamless integration with a wide range of imaging gear. It is equipped with a standard T2 thread, allowing for the effortless attachment of most guiding and imaging cameras currently on the market. Additionally, its design accommodates 31.8mm eyepieces, ensuring compatibility with a variety of accessories for a customizable viewing experience. Whether you are using it to track stars for long-exposure images or as a precision spotting tool, this guidescope delivers the performance and flexibility required for serious astronomical work.

Product Features in Detail

ED Optical Excellence

Unlike standard achromat guidescopes that can show bloated stars, the ED glass in the Evoguide 50 ensures that star points are tiny and crisp. This allows your guiding software to calculate the "centroid" of the star more accurately, resulting in much smoother tracking for your main mount.

Flexible Finder/Guider Roles

The ability to switch between an eyepiece for visual finding and a camera for electronic guiding makes this a highly efficient tool. You can use it to manually center your target and then immediately swap to a camera for a night of automated imaging.

Precision Helical Focuser

The 31.8mm ring focuser is designed for fine adjustments. Because the front objective doesn't rotate, your camera cables won't get tangled while you are focusing—a common frustration with simpler guidescope designs.

Rigid T2 Connection

By using the integrated T2 thread, your guide camera is screwed directly onto the scope. This creates a flex-free connection, which is vital for preventing "differential flexure," a subtle movement that can ruin long-exposure photos even when the guiding looks perfect.

Wide-Field Versatility

With its 50mm aperture, this scope provides a generous field of view. This ensures that even in "star-poor" regions of the sky, you will almost always find a suitable guide star to lock onto for your imaging session.

Lightweight and Portable

Despite its premium optics, the Evoguide ED50 is compact and light. It won't significantly increase the load on your mount, making it a perfect companion for portable setups like the Star Adventurer or small equatorial mounts.