Explore Scientific LER 25mm 52° eyepiece 1.25″
Looking for an eyepiece that delivers outstanding image quality, comfortable use and long service life? The Explore Scientific LER 25mm eyepiece from the 52° series is exactly what you need. This versatile flat-field eyepiece is designed to satisfy both beginners and experienced astronomers who know what they want from their optics.
Flat-field optics with sharp edge-to-edge performance
The Explore Scientific LER 25mm provides exceptionally high image sharpness across the entire field of view - something that is particularly noticeable when observing planets and the Moon. The corrected 52° apparent field of view ensures a pleasant viewing experience with no distortion at the edges. In this respect, the eyepiece clearly outperforms simpler Plossl designs, which, while considered a classic, simply cannot match the performance of a modern LER construction.
EMD anti-reflection coating for maximum contrast
A key element of the optical system is the patented EMD anti-reflection coating (Enhanced Multi-Layer Deposition), which provides high contrast, maximum light transmission and effectively suppresses unwanted reflections and ghost images. The result is a clean, high-contrast image with natural colors - exactly what you expect from a quality eyepiece.
Durable, weather-resistant construction
The designers at Explore Scientific also thought about the practical aspects of everyday use. The eyepiece is argon-purged, which effectively prevents internal fogging and protects the optics from dust, fungus and the ingress of cleaning fluids. Thanks to full waterproofing, you do not need to worry about adverse weather conditions during night observing sessions. This robust construction guarantees that the eyepiece will serve you reliably through countless observations for many years to come.
Why choose the Explore Scientific 52° LER series?
The Explore Scientific 52° LER series represents an ideal balance between maximum comfort, top optical quality and excellent value for money. Eyepieces in this range are suitable for a wide variety of telescopes with a 1.25″ barrel diameter and are equally well suited for visual observation and as a reliable foundation for any astronomy kit.
- Long eye relief for comfortable, strain-free viewing - even with glasses
- 52° apparent field of view with corrected, flat field
- EMD multi-layer anti-reflection coating - high contrast and natural colors
- Argon-purged barrel - no internal fogging, dust or fungus
- Fully waterproof construction for use in any weather
- Compatible with standard 1.25″ focusers
- Suitable for planets, the Moon, deep-sky objects and general stargazing
Technical specifications
| Parameter |
Value |
| Focal length |
25 mm |
| Apparent field of view |
52° |
| Barrel diameter |
1.25″ |
| Optical design |
LER (Long Eye Relief), flat-field |
| Coating |
EMD (Enhanced Multi-Layer Deposition) |
| Fill gas |
Argon |
| Waterproofing |
Fully waterproof |
If you are looking for an eyepiece that will last and bring you pleasure with every look at the sky, the 52° LER series is the right choice.
