The app has up to 10,000 objects in its database covering a wide range of the most popular targets. We did this every time we moved to a new target and could always find our chosen objects close to the centre of the view no matter how much we explored the sky. The clutch enables altitude adjustment and tensioning, while on the opposite side the scope is attached with a Vixen- style clamp. It can provide excellent vistas of star fields, clusters, nebulae, galaxies, planets, the Moon and (with correct filtering or by projection) the Sun. Having done that, we opened up the SynScan app and clicked to connect; it found the mount every time and used the smart device’s GPS to set the time and date. Alignment is easy and there’s an option to align with each object once located in the eyepiece, which helps with greater accuracy for targets nearby. In practice, however, if you’re careful with the mount then you may not need that feature, and the AZ-GTe works perfectly well as a Go-To mount on its own merits. We then switched to NGC 7331, a galaxy in Pegasus, detecting a nice ‘sliver’ of light, although it was quite small. These hinge open to allow easy installation of the optical tube and the locks can be loosened during use to allow tube rotation and balancing. The Startravel 102 is a two-element, air-spaced, achromatic 4-inch scope with a focal length of 500m. The Startravel 102 AZ-GTe is supplied with a red dot finder, a star diagonal and two basic but useful eyepieces, 10mm and 25mm. The supplied adaptor allows standard 1.25-inch eyepieces to be used via the supplied 1.25-inch star diagonal. This gives a focal ratio of f/4.9 and so is considered relatively ‘fast’. The "fast" f/5 focal ratio, combined with today's high-speed films, is excellent for capturing lunar and solar eclipses as well as for nature photographs. It can provide excellent vistas of star fields, clusters, nebulae, galaxies, planets, the Moon and (with correct filtering or by projection) the Sun. Mar 21 2005 01:08 PM | Bill Reinehr in 100mm - 110mm Refractors The Sky Watcher 102 is a small rich-field refractor. Choose your book when you subscribe to BBC Sky at Night Magazine today! The focuser is basic but quite sturdy with a smooth motion. However, in visual use we didn’t notice anything that detracted from using the telescope; Deneb, for example, was pin sharp across almost three quarters of the view in the 25mm eyepiece. A red LED light flashes when a mobile device connects to the on-board Wi-Fi adaptor. The SynScan database covers the main popular targets most people would choose to view, so we went on a tour taking in M57, the Ring Nebula, Albireo (the stunning gold-blue double star in Cygnus) and M27, the Dumbbell Nebula. The size is an effect of using a wide- or rich-field scope, but swapping to the 10mm eyepiece helped improve its visibility. Power is supplied either by a set of eight AA batteries (not supplied) housed in the side of the mount or via an optional power supply providing DC 7.5~14V, 0.75A tip positive. Mounting the telescope on an alt-azimuth or an equatorial mount is quick and simple with the appropriate mounting plate. A 1.25-inch star diagonal and two basic but effective 1.25-inch eyepieces are supplied with the Startravel 102, one with 25mm focal length for wide field views and the other 10mm for higher magnification. The Startravel 102 is a two-element, air-spaced, achromatic 4-inch scope with a focal length of 500m. Crisp images at a reasonable price make it an excellent beginner's "first telescope", or a great travelling telescope for a more advanced observer. Startravel 102 AZ-GTe is a great way to explore the heavens using a smartphone or tablet. On the optics side, the Startravel 102 is a nice, short-focus refractor with a 102mm, two-element, air-spaced objective with a focal length of 500mm. The mount also has a DSLR shutter release port for camera control. Here we check out the company’s Startravel 102 AZ-GTe system which consists of a 102mm, short-focus refractor and a variant of its AZ-GTi mounts, the AZ-GTe. The AZ-GTe mount differs from the AZ-GTi in that it does not incorporate the Freedom Find dual-axis encoders that allow you to hand-move the mount while retaining Go-To accuracy. This makes it a ‘fast’ system with a focal ratio of f/4.9, which helps with large wide-field views suitable for targets such as the Andromeda Galaxy and the Pleiades star cluster. the optical tube assembly is readily carried and with a compressed length of approximately 50cm (21.7") it is easily transported. It was all very easy to assemble, and we were up and running in no time at all. This Sky-Watcher 102mm (4") f/5 telescope is a two-element, air-spaced, fully multi-coated objective, achromatic refractor, which can give exciting "rich field" astronomical views. Visually it gives good colour correction with a little chromatic aberration present towards the field edge. If you’re not familiar with smart devices there’s the option of purchasing a SynScan handset, but for those us comfortable with the connected world, this is a smart new system. The Sky-Watcher AZ-GTe series is for anyone looking for a small, powerful mount. It was while observing M37 – a lovely triangular star cluster high overhead – that we discovered the virtues of the tripod’s extension tube, which prevented the telescope from catching on the top of the tripod mounting. We found the ‘Brightest Star’ alignment worked well using two stars enabling us to place our targets close to the centre of the view of the 25mm eyepiece after it had completed. With the 500mm focal length these eyepieces give magnifications of 50x and 20x respectively.
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