GSO Super Plössl 6mm 52° 1.25″ eyepiece
Looking for an eyepiece that reveals fine details on the surfaces of planets, the Moon, or globular clusters? The GSO Super Plössl 6mm eyepiece is a classic choice for any observer who wants to get the most magnification out of their telescope without unnecessary compromises in image quality. The short 6mm focal length delivers high magnification, while the proven Super Plössl design guarantees a sharp and contrasty image across the entire field of view.
Optical design and construction
The eyepiece is built on a classic four-element optical scheme arranged in two groups - exactly what you expect from a Super Plössl design. This symmetrical construction, consisting of two symmetrically arranged achromatic doublets, provides excellent correction of chromatic aberration and a flat field of view. The 52° apparent field of view is the standard for this type of eyepiece - it offers comfortable viewing and a sufficient overview even at high magnifications.
All optical surfaces are treated with multi-layer anti-reflection coatings that minimize unwanted reflections and light loss, keeping the image bright and contrasty even on more demanding objects.
Performance and compatibility
The 6mm focal length makes this eyepiece particularly well suited for planetary observation. Combined with a telescope of, for example, 1200mm focal length, you get 200x magnification - enough to observe Jupiter's cloud bands, Saturn's rings, or craters on the Moon. The 1.25″ barrel diameter is the universal standard compatible with the vast majority of modern telescopes.
Filter thread and camera adapter
The eyepiece features a standard 1.25″ thread for astronomical filters, so you can easily attach a Moon filter, colored planetary filters, or a UHC filter for nebula observation - without any adapters. For astrophotographers, it is worth noting that the eyepiece supports a camera adapter connection, which enables projection photography directly through the eyepiece.
Eyecup
Please note that an adjustable rubber eyecup is not included, which may be a minor limitation for eyeglass wearers. However, the eye relief of 6mm focal length eyepieces is physically limited regardless of the specific design.
Key specifications
| Parameter |
Value |
| Focal length |
6mm |
| Apparent field of view |
52° |
| Barrel diameter |
1.25″ |
| Optical design |
Super Plössl (4 elements in 2 groups) |
| Lens coatings |
Multi-layer anti-reflection |
| Filter thread |
Standard 1.25″ |
| Camera adapter support |
Yes |
| Adjustable rubber eyecup |
No |
Who is this eyepiece for?
The GSO Super Plössl 6mm is an excellent choice both for beginner astronomers looking for a reliable and affordable high-magnification eyepiece, and for experienced observers building a set of eyepieces covering the full range from wide-field to detailed views. Thanks to its compatibility with camera adapters, it also serves as a starting point for projection astrophotography. This is a time-tested optical design that has maintained its place in practical astronomy for decades - and for good reason.
Recommended uses
- Planetary observation - Jupiter, Saturn, Mars, Venus
- Lunar observation - craters, mountain ranges, rilles
- Globular clusters and double stars
- Projection astrophotography with a camera adapter
- High-magnification visual observation with any standard 1.25″ telescope