Sky-Watcher Eyepiece WA-66 9 mm

WA-66 9 mm Eyepiece, 66° Field of View, 1.25"

The WA-66 9 mm eyepiece offers a wide 66° apparent field of view, fully multi-coated optics (FMC), and good image correction in telescopes with focal ratios up to F/5. This affordable eyepiece is designed to expand the observing capabilities of a telescope. The WA-66 series delivers image quality comparable to the well-known SWA Plossl 58 eyepieces and surpasses popular Erfle eyepieces. Its wide field of view makes locating celestial objects easier, particularly for beginners.

Key advantages

• 66° apparent field of view for comfortable object acquisition and observation.
• Fully multi-coated optics (FMC) to reduce reflections.
• Good image correction in telescopes with focal ratios up to F/5.
• Hybrid optical design.
• 15 mm eye relief for comfortable viewing.
• Affordable pricing and a practical option for replacing or supplementing the eyepieces supplied with a telescope.
• The WA-66 series is available in focal lengths of 6, 9, 15, and 20 mm.

Product description

The WA-66 9 mm eyepiece is intended for astronomical observations with telescopes, including instruments with focal ratios up to F/5. In terms of image quality, the WA-66 series is comparable to SWA Plossl 58 eyepieces and outperforms commonly used Erfle eyepieces.

The wide 66° apparent field of view makes it significantly easier to locate objects in the sky and is particularly convenient for beginner astronomers. Its affordable price and comfortable eye relief make it a practical replacement for a standard telescope eyepiece or an addition to an existing accessory set.

The series includes models with focal lengths of 6, 9, 15, and 20 mm. These are series-wide options; the specified model has a focal length of 9 mm.

Technical specifications