Binorum Ultima 2x Barlow lens 1.25″
Looking for a reliable way to get even more out of your telescope? The Binorum Ultima 2x Barlow lens is a precision optical accessory that simply doubles the focal length of your telescope - and with it the achievable magnification with any eyepiece you already own. The result is sharper detail on planets, globular clusters and other astronomical objects, without having to invest in a whole new set of eyepieces. This applies equally to visual observation and to planetary astrophotography.
How it works
The principle is elegantly simple: you insert an eyepiece into the body of the Barlow lens and secure it with the side locking screw. The Barlow lens is then placed into the focuser drawtube of the telescope in place of the eyepiece. This effectively extends the optical path, virtually doubling the focal length of the telescope.
A practical example: if your telescope with a 10 mm eyepiece achieves 90x magnification, then with the Ultima 2x Barlow lens you get a full 180x - with no loss of observing comfort. Your entire existing eyepiece set effectively expands to double the magnification range, which is a very efficient solution both economically and practically.
Ideal for astrophotography
The same principle applies when photographing. The Barlow lens extends the focal length of the telescope, so on the sensor of your camera or planetary camera you get a larger image scale and more detail in the frame. This makes it a popular piece of equipment for photographing planets, the Moon or the Sun (with a suitable filter).
Optics and construction
The Binorum Ultima 2x Barlow lens 1.25″ is equipped with lenses made from special high-quality optical glass with full multi-layer FMC (Fully Multi-Coated) anti-reflection coating. This coating minimises unwanted reflections on optical surfaces, ensuring maximally contrasty and bright images with minimal ghosting and flare. The lens body is the standard 1.25″ diameter, guaranteeing full compatibility with all eyepieces and focusers of this size - that is, the vast majority of amateur telescopes on the market. The locking screw on the body secures the eyepiece safely in place even at higher magnifications.
Key features
- 2x magnification factor - doubles the focal length of the telescope
- Standard 1.25″ format - compatible with virtually all amateur telescopes
- Full multi-layer FMC coating - maximum contrast, minimal reflections
- High-quality optical glass for sharp and bright images
- Side locking screw for secure eyepiece fixing
- Suitable for visual observation and planetary astrophotography
Who is it for?
The lens is an ideal choice for beginner and advanced astronomers alike who want to extend the magnification range of their telescope without having to acquire a large number of short focal length eyepieces. You will appreciate it when observing the Moon in detail, planets of the solar system, and during photographic sessions where you need to achieve a higher effective focal length. Thanks to the standard 1.25″ format, you simply plug it into any compatible telescope without the need for additional adapters.
Technical specifications
| Parameter |
Value |
| Magnification factor |
2x |
| Barrel diameter |
1.25″ |
| Optical coating |
FMC - Fully Multi-Coated |
| Eyepiece fixing |
Side locking screw |
| Compatibility |
All 1.25″ focusers and eyepieces |
| Suitable for |
Visual observation, planetary astrophotography |
About the Binorum brand
Binorum is a brand born from a genuine passion for astronomy - it is built by people who themselves spend nights under the starry sky. The philosophy of the brand is straightforward: to design and manufacture astronomical accessories that truly work in real observing conditions - from the room-temperature focuser drawtube to freezing nights in the field. Every Binorum product goes through careful quality control and is designed with the needs of amateur and advanced astronomers in mind. Binorum offers a wide range of astronomical accessories - from eyepieces and Barlow lenses to filters and mounting and transport accessories - so everything you need can be found in one place and with proven quality.
