Bresser Spezial Astro SF 15x70 Binoculars
The Bresser Spezial Astro SF 15x70 binoculars are a top-class choice for both astronomical observation and viewing distant terrestrial objects. They combine powerful 15x magnification with large 70mm objectives, delivering a bright and detailed image even when observing faint astronomical targets. The Porro prism design and premium BaK-4 glass ensure outstanding light performance and high-contrast views.
Optical quality
The optical system is built on advanced technology and carefully selected materials. BaK-4 glass elements together with highly corrected eyepieces - each containing five lenses in three groups - produce a sharp image from edge to edge across the full field of view. Full multi-coatings on all optical surfaces reduce unwanted reflections and maximise light transmission, resulting in bright, high-contrast images with excellent colour fidelity.
What can you observe?
The 15x magnification makes these binoculars an ideal tool for detailed views of the lunar surface, planetary events and bright star clusters. They are equally practical for observing distant terrestrial objects, birdwatching and landscape viewing. A 4.4-degree field of view and a visible width of 77 metres at 1,000 metres give you a wide enough view for comfortable scanning and locating objects.
Comfort during observation
The unified focusing system delivers a sharp image at all astronomical distances without the problem of focus drift, which greatly improves observing comfort. Fold-down rubber eyecups provide spectacle wearers with an optimal 20mm eye relief for full use of the wide field of view. The large eyepiece diameter makes extended observation sessions comfortable and reduces eye fatigue.
Durable and weather-resistant build
The robust aluminium body is protected by an ergonomic rubber armour that provides a secure grip and guards against impacts and harsh weather conditions. The waterproof, argon-filled construction prevents internal fogging and ensures reliable performance in demanding conditions. Dust protection keeps the optical elements clean and functional over the long term.
What is included?
The binoculars come with everything you need for immediate use:
- Protective carry case
- Objective lens caps and eyepiece caps
- Neck strap
- Dioptre compensation for individual adjustment
A tripod mounting thread on the extended central axis allows attachment to any photographic tripod using an optional tripod adapter.
Technical specifications
| Parameter |
Value |
| Magnification |
15x |
| Objective diameter |
70 mm |
| Field of view |
4.4 degrees |
| Field of view at 1,000 m |
77 m |
| Eye relief |
20 mm |
| Exit pupil |
4.7 mm |
| Twilight factor |
32 |
| Minimum focus distance |
10 m |
| Interpupillary distance |
56-74 mm |
| Prism type |
Porro BaK-4 |
| Optical coatings |
FMC (Fully Multi-Coated) |
| Body material |
Aluminium with rubber armour |
| Waterproof / fogproof |
Yes - argon filled |
| Dimensions |
290 x 215 x 85 mm |
| Weight |
1,900 g |
About Bresser
Bresser is a traditional German manufacturer of optical instruments with over 60 years of experience in astronomy and nature observation. The brand is synonymous with reliability, precision and an innovative approach to optical technology. Every binoculars in the Spezial Astro range undergoes strict quality control and is designed to meet the high expectations of both beginners and advanced observers. Bresser continuously invests in research and development, using the latest materials and manufacturing processes to guarantee long-term reliability and exceptional optical quality.
