Vixen NPL Plössl 8mm eyepiece 50° 1.25″
The Vixen NPL Plössl 8mm is a reliable, well-built eyepiece that delivers impressive optical performance at an accessible price. Part of the well-regarded Vixen NPL series, this eyepiece is based on the classic four-element Plössl design - a formula trusted by astronomers worldwide for its excellent balance of sharpness, contrast, and value. Whether you are just starting out or have years of observing experience, the NPL 8mm is a practical and capable addition to any eyepiece collection.
Key features
- 50° apparent field of view - a comfortable and well-defined field suitable for both planetary and lunar observation
- FMC (fully multi-coated) lenses on all optical surfaces for maximum light transmission and minimal glare
- Standard 1.25″ barrel with filter threads for easy use of lunar, planetary, or nebula filters
- Compact and lightweight design - well suited for binocular viewers where balance and size are important
- Durable construction for reliable performance in the field
Optical performance
The 8mm focal length delivers high magnification, making this eyepiece particularly well suited for detailed observation of the Moon and planets. The FMC multi-coated optics ensure that light passes through the lens elements with minimal loss, producing images that are sharp, high in contrast, and accurate in color rendition. The classic Plössl design keeps aberrations well controlled across the field, so stars remain crisp from center to edge.
At 8mm, typical magnification will depend on your telescope's focal length. For example, a telescope with a 1000mm focal length will yield approximately 125x with this eyepiece - suitable for resolving lunar craters, planetary disk detail, and close double stars.
Compatibility and use
The standard 1.25″ barrel fits the vast majority of telescopes currently available, including refractors, reflectors, and catadioptric designs. The barrel is threaded for standard 1.25″ filters, allowing you to attach a Moon filter, color planetary filter, or narrowband nebula filter without any adapters. The compact size and low weight also make this eyepiece a natural choice for use in binocular viewing attachments, where matched pairs of identical eyepieces and minimal weight are essential for comfortable viewing.
What can you observe?
- Moon - surface detail, crater morphology, rilles, and mountain ranges at high magnification
- Planets - disk features on Jupiter and Saturn, polar caps on Mars, phases of Venus and Mercury
- Double stars - separation of closer pairs within the resolution limit of your telescope
- Bright deep-sky objects - globular clusters, planetary nebulae, and compact galaxies
Technical specifications
| Parameter |
Value |
| Optical design |
Plössl (4-element, 2-group) |
| Focal length |
8mm |
| Apparent field of view |
50° |
| Barrel diameter |
1.25″ |
| Eye relief |
approx. 6mm |
| Lens coating |
FMC - fully multi-coated |
| Filter thread |
Standard 1.25″ |
| Compatible telescopes |
All standard 1.25″ focusers |
Who is this eyepiece for?
The Vixen NPL Plössl 8mm is a practical choice for beginners building their first eyepiece set, as well as for experienced observers who want a dependable short-focal-length eyepiece for high-magnification work. It performs above its price point and holds up well against eyepieces that cost considerably more. For anyone looking to explore planetary detail without overextending their budget, this eyepiece is a straightforward and honest recommendation.
About the Vixen NPL series
The Vixen NPL range is designed to provide consistent, predictable optical quality across all focal lengths in the series. Using matched NPL eyepieces across your collection ensures uniform performance and a familiar viewing experience from session to session. The series covers a practical range of focal lengths, allowing you to build a complete eyepiece set from a single trusted family of optics.
