Explore Scientific 68° Ar Eyepiece 20mm (1.25")

Explore Scientific 68° Ar Eyepiece 20mm (1.25")

Description:
The Explore Scientific 68° Ar 20mm eyepiece (1.25") offers a panoramic field of view with exceptional optical clarity, making it an excellent choice for both visual astronomy and extended observation sessions. The generous 68° apparent field enables immersive views, while the 20mm focal length provides a versatile balance of magnification and field coverage.
This eyepiece is internally purged with dry argon gas and fully waterproof. This construction ensures protection from internal condensation and enhances thermal stability over time. The optical system is treated with 15-layer Enhanced Multi-Layer Deposition (EMD) coatings across all air-to-glass surfaces to maximise light transmission and contrast while reducing stray reflections.
Edge-blackened elements help suppress internal light scatter, ensuring that contrast and sharpness are preserved across the entire field of view. A foldable rubber eyecup and long eye relief make this eyepiece comfortable for all users, including those who wear glasses.
Built from stainless steel and precision-machined components, this eyepiece is designed for durability and consistent optical performance. It is part of the Explore Scientific 68° Series, known for excellent value and reliability in both planetary and deep-sky observing.

Technical specifications:
• Apparent field of view: 68°
• Focal length: 20 mm
• Barrel diameter: 1.25" (31.7 mm)
• Eye relief: long, suitable for eyeglass wearers
• Optical coatings: 15-layer Enhanced Multi-Layer Deposition (EMD)
• Waterproof: Yes, argon-purged and sealed
• Eyecup: foldable rubber
• Lens groups/elements: 6/4
• Material: stainless steel
• Net weight (without caps): 265 g

Additional information:
All Explore Scientific 68° Series eyepieces are argon-purged, waterproof, fully multi-coated, and edge-blackened to deliver maximum contrast. 10-year limited warranty with product registration.