The Sky Watcher Startravel 102 Refractor Astronomy Telescope with EQ1 Mount 10733 are two-element, air-spaced achromatic refractors, that are well proven performers for 'Rich-Field' views of comets, star fields, star clusters, nebulae, bright galaxies & planets, the Moon and the Sun (with proper safety filtering!), as well as giving excellent daytime terrestrial views when used with an erecting prism (not supplied with this model).
These short-tube, wide-field telescopes work well as fixed aperture lenses for both planetary and astronomical photography. They are useful for taking pictures of nature and lunar and solar eclipses due to their "fast" focal ratios.
Included with the EQ1 equatorial mount, which when polar aligned will make it simple for you to use the slow motion control wires to monitor objects as they move across the night sky.
102mm achromatic refractor
Air-Spaced Two-Element Achromatic Refractors
A standard single lens directs light of various wavelengths to various focal points.
Air-spaced two-element lenses, which minimise chromatic aberration more than conventional doublet lenses, are used in the construction of all Sky-Watcher Refractors. This Sky-Watcher Startravel 102 is a 102mm (4") f/5 telescope and is an intriguing "rich field" achromatic refractor with two elements, air spacing, and completely multi-coated objectives. Excellent views of star fields, clusters, nebulae, galaxies, planets, the Moon, and (with the right filtering or through projection) the Sun can be obtained. When set up on a camera tripod or an alt-azimuth mount, it also makes a great terrestrial telescope.
It makes a superb "first telescope" for beginners and a fantastic travel telescope for seasoned observers because of its clear images and affordable pricing.
Similar to the well-known 80mm f/5 refractor, this bigger aperture type accepts 2" diagonals for amazing wide field views and has more light gathering power at the same focal ratio with less weight and chromatic aberration.
With a compressed length of about 50 cm (21.7") and a weight of around 3 kg (6.5 lbs), the optical tube assembly is easily carried.
The Startravel 102 is quick and simple to set up as a refractor, and the enclosed optics, which require little maintenance, are factory-collimated. "Tube mounting rings" are included with the optical tube assembly. These may be opened on a hinge to make installing the optical tube simple, and the locks can be released while in use to allow rotation and balance of the optical tube. With the proper mounting plate, it is quick and easy to mount the telescope on an equatorial or alt-azimuth mount. Additionally, this telescope functions well as a 510mm fixed aperture lens for both terrestrial and astronomical photography.
With today's high-speed films and the "fast" f/5 focal ratio, you may take stunning photos of nature and lunar and solar eclipses. Longer exposure astrophotography requires a stable equatorial platform and a guiding system. A suitable T-adapter may be directly attached to the eyepiece holder's T-mount thread, and an optional extension tube provides closer focussing for taking pictures of the ground.
Optical Design Achromatic Refractor
Magnifications (with optics supplied): x20, x40, x50, x100
Highest Practical Power (Potential): x204
Objective Lens Diameter: 102mm
Telescope Focal Length: 500mm (f/4.9)
Eyepieces Supplied (1.25"): 10mm & 25mm
x2 Deluxe Barlow Lens
Direct SLR Camera Connection
Red Dot Finder
Dual-Fit 1.25"/2" Focuser
1.25"/31.7mm Star Diagonal
Multi-Coated Objective Lens
EQ1 Equatorial Mount
Aluminium Tripod with Accessory Tray
62.5% more Light Gathering than 80mm
Net Weight 8.4kg
Box Weight 10.10kg
Box Dimensions (LxWxH in mm) 950x440x250
Warranty 1 year