Refractor telescope Skywatcher BK 1149 EQ1 114 mm aperture 900 mm focal length

Skywatcher BK 1149 EQ1 is a refractor telescope with a 114 mm aperture and a 900 mm focal length mounted on an EQ1 equatorial mount. Designed for visual observation of the Moon, planets and brighter deep-sky objects, this instrument offers increased light-gathering capability compared with smaller beginner scopes and a compact optical layout that balances portability with resolution. The included EQ1 mount provides manual equatorial tracking and basic polar-alignment support, enabling steadier views and easier follow-up of targets across the sky.

Advantages

The 114 mm aperture collects significantly more light than typical small refractors, improving contrast and detail when observing lunar and planetary features and some brighter nebulae and star clusters. The 900 mm focal length yields a moderate focal ratio that is versatile for both low- and medium-power eyepieces, while the EQ1 equatorial mount simplifies manual tracking along right ascension. The telescope's refractor design means low maintenance and no mirror collimation is required, making it convenient for beginners and intermittent observers.

Suitable for

• Visual observation of the Moon and planets
• Viewing of brighter deep-sky objects (open clusters, bright nebulae)
• Beginner-level astrophotography with short-exposure attempts and planetary imaging
• Educational use, backyard and casual observing sessions

Key specifications

• Optical type: refractor
• Aperture: 114 mm
• Focal length: 900 mm
• Focal ratio: f/7.9 (approx.)
• Mount type: equatorial mount (manual EQ1-style)
• Suitable for visual observing and short-exposure imaging
• Portability: moderate, compact tube length for the given aperture

How to use

Set the telescope tube securely on the EQ1 equatorial mount and perform a rough polar alignment by orienting the mount's polar axis toward the celestial pole. Start with a low-power eyepiece to locate targets and achieve initial focus, then switch to higher-power eyepieces as seeing conditions and target brightness permit. Use the equatorial mount's right ascension axis to manually track objects across the sky; small periodic adjustments are typically required for longer observing sessions. For short-exposure planetary imaging, attach a suitable camera at the focuser and use live-view or video capture to collect frames.

Usage recommendations

For best visual results, allow the telescope to reach thermal equilibrium with the outdoor temperature before detailed observing. Begin sessions during stable seeing and use low- to medium-power eyepieces to identify targets; increase magnification only when atmospheric conditions are steady. When attempting basic astrophotography, keep exposures short and use a stable tripod and mount settings to reduce vibrations.