Bresser Plössl PL 25mm 50° 1.25″ eyepiece
Looking for an eyepiece that delivers solid optical performance at a reasonable price and fits the vast majority of astronomical telescopes? The Bresser Plössl PL 25mm is exactly that. This eyepiece with a 25mm focal length and 50° apparent field of view is a classic instrument that has won the trust of beginners and experienced observers around the world. The Plössl design brings optically proven quality backed by a long history - at an accessible price.
Optical design and image quality
The eyepiece is built on the classic 4-element Plössl design, divided into two symmetrically arranged groups. This concept offers excellent correction of both chromatic and spherical aberration, resulting in a sharp, high-contrast image across the entire field of view. Multi-coating on all optical surfaces significantly reduces unwanted reflections and maximises light transmission - something you will especially appreciate when observing faint deep-sky objects or studying planetary details. The 50° apparent field of view is characteristic of the Plössl design and provides a clear, comfortably spacious view with no noticeable vignetting at the edges.
Build quality and compatibility
The eyepiece body is made from metal, ensuring durability, a pleasant feel in hand, and long service life. Weighing only 98 g, it is an easy-to-carry accessory that places no unnecessary strain on your telescope's focuser. The standard 1.25″ barrel fits the vast majority of refractors, reflectors, and catadioptric systems available on the market.
Additional practical features include:
- Filter thread - allows easy attachment of Moon, UHC, or other visual and astrophotography filters without additional adapters
- Foldable eyecup - suitable for use both with and without glasses; simply fold or extend it according to your preference
What can you observe with this eyepiece?
The Bresser Plössl 25mm is a versatile medium-power eyepiece suited to a wide range of observing targets:
- Short telescopes (focal length approx. 500-800 mm) - provides low to medium magnification, ideal for sweeping views of star clusters, nebulae, and galaxies
- Long telescopes (focal length approx. 900-1500 mm) - delivers medium to higher magnification, well suited to lunar and planetary detail
This makes it an ideal first eyepiece or a reliable backup that you should always have on hand.
Technical specifications
| Parameter |
Value |
| Focal length |
25 mm |
| Apparent field of view |
50° |
| Barrel diameter |
1.25″ |
| Optical design |
Plössl (4 elements in 2 groups) |
| Coating |
Multi-coated (all surfaces) |
| Body material |
Metal |
| Weight |
98 g |
| Filter thread |
Yes |
| Foldable eyecup |
Yes |
Summary
The Bresser Plössl PL 25mm 1.25″ is a reliable and affordable eyepiece whose performance will surprise anyone who looks through it for the first time. Whether you are starting your astronomy journey or expanding your eyepiece collection, this piece deserves a firm place in it.
