Sky-Watcher 102 StarTravel Refractor Telescope w/ AZ Pronto Mount The Sky-Watcher 102 StarTravel is a 102mm Achromatic Refractor Telescope that come with short focal length of 500mm. This noticeably shorter tube compared to other telescopes of the same class allows it to deliver a wider field of view with standard eyepieces. The compressed length of the telescope makes it convenient for it to be packed up and stored away while not in use or in transit. Premium Astronomy and Terrestrial ObservationSky-Watcher 102 StarTravel refractor telescope is the well proven performer in value for views of comets, star fields, star clusters, nebulae, bright galaxies & planets, the Moon and the Sun (with proper safety filtering!). Supplied with the sturdy and easy to use AZ Pronto mount, which provides excellent stability and precise control, via its fine tracking adjustment knobs, on both the horizontal (azimuth) and vertical (altitude) axes, this Sky-Watcher 102 StarTravel is also used as a daytime terrestrial telescope. The Refractor AdvantageImages viewed through a refractor telescope have a classic quality that other telescope designs lack. Since a refractor does not use mirrors to view objects, you get a generally sharper image. Images are also displayed without the secondary mirror shadow, making it suitable for terrestrial viewing when used with a 45° erecting image diagonal provided. In the Box: 102mm Achromatic Refractor Pronto Mount with Tripod Fine Tracking Adjustment Knobs 2 Eyepieces Super 10mm (50x) & Super 25mm (20x) – 1.25″ Barrel Red Dot finderscope Telescope Eyepiece Adapter from 2″ to 1.25″ with T2 Thread 45° Erect image Diagonal – 1.25″ Barrel Model SW1025STARTRAVEL Optical design Multicoated Achromatic Refractor Aperture 102mm Focal Length 500mm Focal Ratio f/4.9 Resolving Power 1.25″ Stellar Limit Magnitude 12.3 Highest Practical Magnification 204x Light gathering power (compared to the unaided eye) 212 Focuser Diameter 2″ Recommended Usage Viewing Moon and Planets Nature viewing