Tele Vue Plossl 20mm 1.25 inch Eyepiece

The Tele Vue Plossl 20mm 1.25" eyepiece delivers exceptional image quality and comfort for a wide range of astronomical observations. Designed with a classic 4-element Plossl configuration, this eyepiece offers a 50° apparent field of view and 15mm of eye relief, making it ideal for lunar, planetary, and deep-sky viewing. Multi-coated optics and blackened lens edges ensure high contrast and minimal glare, while the foldable rubber eyecup provides comfortable viewing for eyeglass wearers. The anodized aluminum housing is durable and lightweight, and the parfocal design allows for easy focusing when switching between Tele Vue Plossl eyepieces.

Advantages

This eyepiece provides sharp, high-contrast images across the entire field of view. The 20mm focal length offers a good balance between magnification and field width, suitable for both wide-field and detailed observations. The multi-coatings enhance light transmission and reduce reflections, while the blackened lens edges further improve contrast. The foldable eyecup is a thoughtful feature for eyeglass users, and the parfocal design saves time during observing sessions.

Suitable for

• Lunar and planetary observation
• Deep-sky objects such as star clusters and nebulae
• General purpose astronomy with telescopes of various types
• Eyeglass wearers due to generous eye relief

Key specifications

• Focal Length: 20 mm
• Barrel Size: 1.25 inches (31.7 mm)
• Eyepiece Design: Plossl
• Apparent Field of View: 50°
• Eye Relief: 15 mm
• Optical Elements: 4 elements in 2 groups
• Coatings: Multi-coated
• Filter Threads: Yes, 1.25"
• Blackened Lens Edges: Yes
• Rubber Eyecup: Foldable
• Housing Material: Anodized Aluminum
• Parfocal: Yes (with other Tele Vue Plossls)
• Field Stop Diameter: 17.2 mm
• Barrel Safety Recess: Yes

Recommendations

For best performance, pair this eyepiece with a quality telescope of any type (refractor, reflector, or catadioptric). The 20mm focal length works well with a variety of magnifications depending on your telescope's focal length. Consider using a 1.25" filter for enhanced views of planets or the moon.