Okulár Explore Scientific 52° LER 30 mm (2 inch)

The Explore Scientific 52° LER 30mm eyepiece delivers a wide 52° apparent field of view with long 22mm eye relief, making it a versatile choice for comfortable, immersive viewing across a range of telescopes. Its 2-inch barrel and fully multi-coated optics ensure bright, high-contrast images, while the argon-purged waterproof housing provides durability for outdoor use.

Advantages

This eyepiece combines a generous 30mm focal length with a 52° apparent field, offering a balance between magnification and field width for observing large deep-sky objects like open clusters and nebulae. The 22mm eye relief is especially beneficial for eyeglass wearers, allowing the full field to be seen without removing glasses. Fully multi-coated lenses with EMD coatings maximize light transmission, and the blackened lens edges reduce internal reflections for improved contrast. The anodized aluminum body with rubber grip is both lightweight and durable, and the argon purging prevents internal fogging even in humid conditions.

Suitable for

• Visual observers using telescopes with 2-inch focusers
• Astrophotographers needing a wide-field eyepiece for framing
• Eyeglass wearers requiring long eye relief
• Observers in humid or dusty environments thanks to waterproof sealing

Key specifications

• Focal length: 30mm
• Apparent field of view: 52°
• Barrel size: 2" (50.8mm)
• Eye relief: 22mm
• Optical design: 5 elements in 3 groups
• Coatings: EMD fully multi-coated
• Waterproof and argon-purged
• Filter threads: 2"
• Housing: Anodized aluminum with rubber grip
• Dust caps included: front and rear

Recommendations

For observers seeking a high-quality, comfortable wide-field eyepiece that performs well in any weather, the Explore Scientific 52° LER 30mm is an excellent addition to your eyepiece collection.