Reflecting telescope with an aperture of 70 mm and a focal length of 900 mm. The telescope is suspended on the EQ1 parallactic mount, intended for astronomical observations. Equatorial mounts allow you to follow the observed object in its movement across the sky. In addition, the assembly has micromovements, thanks to which it is possible to precisely point the telescope at the object. This telescope is well suited for observing the Moon, it allows you to see the basic details of the planets of the Solar System, and after using an additional solar filter, it allows you to observe sunspots.
Optical system
BK709EQ1 is a long focal achromatic refractor. In other words, it is a lenticular telescope built on the basis of a two-element objective with lenses of two different types of optical glass. The lens diameter is 70mm and the focal length is 900mm. With a f / 12.9 light output such a telescope can be considered a long-focus telescope that works best in lunar, solar (with a filter) and planetary observations. The set also includes 2 Kellner glasses with a focal length of 25 mm and 10 mm.
Assembly
The telescope is suspended on a lightweight EQ1 equatorial mount. It is an assembly intended for novice users, the lightest of the equatorial assemblies manufactured by Sky-Watcher. Instead of the azimuth and height axes, such a mount has two axes inclined at an angle equal to the latitude. Thanks to this axis arrangement, the tracking of objects in the sky is only carried out in one axis. It is even possible to connect a simple optional drive that will significantly increase comfort by keeping objects in the telescope's field of view. This is capable of micromovements, i.e. special knobs that allow the telescope to be gently moved in both axes.
Focuser
The telescope is equipped with a 1.25 “ focuser. It is a rack lift (so-called Rack & Pinion lift). The 1.25 "standard mirror angle attachment is included in the set. The focuser is compatible with the Sky-Watcher parts.
Aiming scope Aiming scope It is used to easily direct the telescope to the object we want to observe. | 5 x 24 mm |
| Attached glasses Attached glasses | Kellner K 10 mm  A popular achromatic eyepiece with a wide field of view reaching 40°, providing good image quality at the edges of the observation field. Kellner K 25 mm A popular achromatic eyepiece with a wide field of view reaching 40°, providing good image quality at the edges of the observation field. |
| Product weight [g] | 7640 |
| Resolution | 2" |
| Eyeglass Telescopes can be supplied with an eyepiece focuser in two standards - 0.98" and 1.25". This information is important to determine the compatibility of the equipment with additional eyepieces, photographic adapters, etc. | 1,25" |
| Fibber The ratio of the focal length of an optical instrument to its diameter. It is a constant that determines the amount of light reaching the focal point of the main lens or mirror. In practice, the smaller the value of f, the better and more accurate the image we get. | f/12,9 |
| Focal [mm] Focal length [mm] | 900 |
| Optics | Refraktor |
| Star range [magnitude] | 11.80 |
| Suggested for observation Moon and its craters, Mars, Venus, Jupiter with its moons, constellationsDue to its characteristics, this telescope is best suited for detailed observations of the Moon's surface, observations of the closer planets and Jupiter with its moons, as well as any low-contrast space objects with a visual background. | Stars constellation Deep sky objects Solar System |