Svbony 12.25mm Illuminated Reticle Plossl eyepiece 🔭

This 12.5mm Plossl eyepiece from Svbony offers an illuminated double-line crosshair specifically to help with polar alignment and centring guide stars when doing guided astrophotography. It combines a multi-coated, four-element optical design with 40 degree apparent field of view to make target acquisition easier and to keep colour fringing to a minimum.

Key Points

The eyepiece uses a double crosshair reticle with adjustable LED illumination and focus, which makes it straightforward to mark and centre faint stars for guiding or to align an equatorial mount. The inside threaded barrel helps reduce stray internal reflections for a cleaner view. Brightness can be adjusted to suit different sky backgrounds, and the reticle focus allows the crosshairs to be set sharply at the same plane as the sky image, helping when you need precise framing for long exposures. 🌌

Comfortable eye relief of around 11 mm allows longer observing sessions without immediate eye fatigue. The 1.25 inch standard fit means it will work with most common telescope focusers and diagonals, and it is compatible with standard 1.25 inch filters when those are required for imaging. For observers who frequently switch between eyepieces and guiding scopes, the familiar Plossl design keeps the visual experience predictable. 🔭

Consider that the illuminated reticle relies on a small LED power source, and according to the manufacturer the brightness range may not be as wide as in larger dedicated guider eyepieces. Also, the 40 degree apparent field is moderate rather than wide, so it assists framing and centring rather than providing a very immersive wide-field view.

Technical Specifications

• Name: Svbony 12.5mm Plossl 1.25" Illuminated Reticle Eyepiece
• Focal length: 12.5 mm
• Apparent field of view: 40 degrees
• Eye relief: 11 mm
• Barrel size: 1.25 inches
• Optical design: 4 elements Plossl, multi-coated
• Reticle: Double-line crosshair with adjustable LED illumination

Practical Tips

When using the illuminated reticle for polar alignment, set the reticle focus so the crosshairs are crisp and overlay the star field without parallax. Reduce LED brightness on darker nights to avoid washing out faint stars. For astrophotography guiding, ensure the reticle illumination is stable and that any power source is secured to avoid introducing vibration. For imaging setups that use filters, remember the internal threading allows some accessories to be attached while keeping stray light under control. 🔧