Sky-Watcher 90° Eyepiece for Polar Scope

The Sky-Watcher 90° Eyepiece for Polar Scope is a specialized accessory designed to bring enhanced convenience and functionality to the critical task of polar alignment. By allowing users to look into the polar finder at a 90° angle, it completely eliminates the need to kneel on the ground or contort into uncomfortable positions during setup. This angled design features an integrated Amici prism with coated optical surfaces to ensure the image orientation remains undisturbed, providing consistent and reliable visual feedback while you fine-tune your mount’s position.

Beyond its ergonomic benefits, this eyepiece offers advanced technical features such as adjustable focus and a versatile zoom function with 1x and 2x options. This allows you to switch between a wide overview for initial positioning and a detailed view for pinpoint accuracy. The 360° rotatable design provides further flexibility, ensuring a comfortable viewing angle regardless of the mount's orientation. Installation is straightforward—the metal unit simply slides over your existing polar finder and is fixed in position, instantly making your alignment procedures more efficient, accurate, and physically comfortable.

Product Features in Detail

Ergonomic Alignment Comfort

The primary advantage of this accessory is the "Elimination of Kneeling." Polar scopes are often located at the bottom of the mount's RA axis, forcing astronomers into difficult physical positions. The 90° bend allows you to stand or sit comfortably while looking down into the eyepiece.

Dual-Power Zoom Precision

The switchable zoom is a game-changer for accuracy. Use the 1x setting to see a wider field and identify Polaris and the surrounding constellations; then, flip to 2x magnification to zoom in on the reticle for the final, high-precision adjustment.

Independently Adjustable Focus

Because every observer's vision is different, the eyepiece includes an adjustable focus mechanism. This allows you to sharpen the fine lines of the polar reticle and the distant stars simultaneously, ensuring you aren't squinting at a blurry image.

Correct-Image Amici Prism

While many diagonal mirrors flip the image, this eyepiece uses a precision Amici prism. This ensures that the image orientation remains undisturbed, meaning "up" is still "up," which is vital when you are following the specific positioning instructions on your polar alignment app.

360° Rotatable Viewing Angle

Depending on where your counterweight bar or telescope is pointed, the polar scope can end up in awkward rotations. The rotatable design allows you to spin the eyepiece to the side or top, ensuring you always have clear access to the view without being blocked by your tripod legs.

Simple "No-Tool" Installation

The eyepiece is designed for immediate use. Its metal collar fits securely over the standard Sky-Watcher polar finder housing. Once in place, a simple thumb screw fixes it in position, making it easy to attach at the start of the night and remove for transport.