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Now available: the new CGEM II mount from Celestron

May 17 2017, Stefan Taube

The American telescope manufacturer Celestron has revised their work horse for astrophotographers. The CGEM II is very popular, and rightly so, because when it comes to load bearing capacity it has a lot of reserves as compared to the smaller Advanced VX mount; but it is cheaper than the big CGX. In the field of equatorial GoTo mounts for mobile astrophotography the CGEM II takes a middle position.

CGEM II

The new CGEM II not only looks very trendy, but it also features a few real innovations when compared with its predecessor.

  • New powerful motor electronics with the latest firmware.
  • USB 2.0 port on the hand controller. This way you can simply connect the hand controller to a PC for software updates.
  • PPEC (Permanent Periodic Error Control) ensures precise tracking.
  • Autoguider port. Indispensable for sophisticated astrophotography!
  • Tracking beyond the meridian.
  • The mounting saddle accepts prism rails acc. to Vixen and Losmandy standard. No adapter required.
  • Improved tripod with height marks: This makes it even easier to place the tripod horizontally.

With this mount, the telescope, camera and guider may have a weight of up to 18 kg. This leaves a really big tolerance range.

We offer the CGEM II, but also as a set together with the Schmidt-Cassegrain optics with apertures ranging from 8 to 11 inch (~200 to 280 millimetres): CGEM-II telescopes.

Combined with the classic SC-telescopes this provides you with excellent astronomical equipment which will give you joy for the rest of your life! If you have extra spending money, you should consider the CGEM II with EdgeHD. This variant of the Schmidt-Cassegrain telescope already has the correction optics for the unavoidable coma error integrated, allowing you to take sharp photos right to the edge.

Whatever you will decide, with the CGEM II you can’t go wrong!

Celestron CGX: a mount close to the limits of perfection

February 27 2017, Stefan Taube

The Celestron brand once again has set the standard for hobby astronomers: The new CGX-mount combines the current technical standard with a well thought out product design – and all for an reasonable price.

CGX-Montierung

Some special features of the CGX-mount:

  • Toothed belt drive and spring pressure mechanism: The belt drive minimises the gear play when changing the direction of movement (“backlash”). The spring pressure mechanism ensures uniform contact pressure between the worm gear and shaft, reducing friction and optimising the operation of the gear – also evident by the reduced noise level.
  • Optical encoders register the position of the mount. The motors can then be stopped before the mechanical slew limit is reached and approach their home position. The mount is able to track objects up to 20° above the meridian.
  • Internal wiring: Only the power supply cable and the cable to the hand control box are exposed. However, the sockets for these exposed cables are arranged in such a way that they do not need to move with the mount.

Der neu konzipierte Antrieb der CGX-Montierung.

  • Large handles: Transport handles ensure easy transport, but all clamping levers are also designed for operation with gloves.
  • Compact design: The saddle plate position near the right ascension axis gives the mount very favourable oscillation characteristics. The declination motor serves as a counterweight.
  • Latest variant of the Nexstar+ control with internal clock to save the last settings and USB-port for simple software update.

Further information on our CGX product page.

Die neue CGX-Montierung mit dem EdgeHD 925 Teleskop.

The CGX-mount is available on its own or as a set with the well-established Schmidt-Cassegrain optics from Celestron. You can find all variants under the link CGX-Telescopes.For ambitious astrophotographers we highly recommend the CGX 925 in its Edge HD version. The most reasonably priced and recommended combination of SC-optics and mount for beginners is the CGX 800.

However, due to the dual Vixen/Losmandy saddle plate you can easily combine almost any other optic from other manufacturers with the CGX-mount.

Celestron Astro Fi: beginner telescopes with App

January 16 2017, Stefan Taube

It all started with the NexStar Evolution: Celestron had this telescope series equipped with WIFI. This enables you to connect your tablet or smartphone with the telescope. This not only gives you the opportunity to control your telescope without cables, you can also utilize all functionalities of the free-of-charge App Celestron SkyPortal: Your display screen uses an appealing planetarium view to show the current view of the sky and provides you with a lot of background information. The most popular objects are available as images and even an Auto-Guide (in English).

Celestron now offers this technology also for reasonable starter telescopes. At present this series Astro Fi consists of four different instruments:

Newton telescope N 130/650 AZ GoTo Astro Fi 130

Refractor N 90/910 AZ GoTo Astro Fi 90

Maksutov telescope MC 102/1325 AZ GoTo Astro Fi 102

Schmidt-Cassegrain telescope SC 127/1250 AZ GoTo Astro Fi 5

astro-fi-5

Our tip: The Astro Fi telescope with SC optics.

The model Astro Fi 5 mentioned last is particularly interesting. With its aperture of 5 inches it is already relatively fast. However, the telescope is very compact and thus only has a minor leverage effect on the tripod. The closed tube protects the main mirror against contamination. Moreover, SC optics show a high adjustment stability. Despite their compact design and the high focal length, SC optics are highly suitable for taking photos of moon and planets – a well suited camera is the NexImage 5.

As already described before, all four Astro Fi telescopes generate a WIFI for the control via the SkyPortal App. In contrast to the NexStar Evolution, Celestron delivers the Astro Fi without an additional manual control box.

Just like the bigger Celestron telescopes, the Astro Fi also come with the SkyAlign technology. This is a particularly simple technique for aligning the computer control to the actual night sky and your station. At the beginning of your stargazing session you must align the telescope to three bright celestial objects, that is all. The telescope uses the angles between the objects and the GPS-data from the smartphone or tablet to calculate the actual view of the sky. After this short procedure you can automatically approach any object that the SkyPortal-App shows you. All you must do, just touch the object on the touchscreen.

The special feature of this SkyAlign method is the fact that you even don’t need to know the names of the three bright objects you use for initializing the control. For beginners this is a great help, but it is also a useful feature for experienced stargazers, because at dawn the number of visible stars is often too low to assign the correct names.

The Astro Fi telescopes are equipped with a battery compartment. However, the best power supply method surely is the LiFePO4 powerpack from Celestron.

Celestron Inspire: New ideas for starter telescopes!

October 17 2016, Stefan Taube

My first telescope was a small, 60 millimetre refractor on a very wobbly azimuthal mount with a wooden tripod. Even though it was only a very simple piece of equipment, I had fun with it right from the beginning. I can still remember the fascination when looking at the Orion nebula for the first time. Even today I gladly use this simple achromatic telescope to watch sunspots – obviously through a solar filter!

However, such reasonable starter telescopes do not have to be wobbly! Telescope manufacturer Celestron shows that even budget-priced refractors on azimuthal mounts can feature exquisite product design. The new Inspire series features a few really innovative improvements.

Inspire

This starts with a solid steel tripod. The accessory plate, which also stabilizes the tripod, no longer needs to be unscrewed after a star gazing session (the screw required for this purpose will sooner or later be lost in the grass anyway). Just simply open the interlock instead and fold down the tripod including the accessory plate. It has never been more convenient to set up or disassemble a tripod!

Apart from this, the clamping screws for the extendable tripod legs point inwards to make sure that you will not accidentally get entangled with your trousers.

Stativ InspireFurther features of the Inspire series:

  • The newly developed red dot finder comes with target circles instead of an annoying centre mark.
  • The Amici prism ensures an upright image, so that daytime nature observations are also possible.
  • The focusing screws of the focuser are big and have a good grip to allow the use of gloves.
  • The dust protection lid for the eyepiece also serves as a smartphone adapter. All eyepieces included in the scope of delivery can be clamped into this lid, just like the smartphone. This allows you to use your smartphone to take magnified photos of the Moon and planets through the eyepieces.
  • The mount is equipped with an integrated red light lamp. The diffuse light of this lamp illuminates the accessories plate without dazzling the eyes. However, you can easily pull the lamp out of the mount to use it as a pocket torch.

Currently, Celestron offers three models of the Inspire series

Each of these three models is far better than my first telescope, but I still had a lot of fun with it!

 

New: Celestron Powertank Lithium 86 Wh

August 8 2016, Stefan Taube

The Powertank portable, rechargeable batteries are an easy and economical way of ensuring power supply to the motorized mounts. With its lithium-vivianite rechargeable battery, the manufacturer, Celestron, has introduced a new Powertank to the market: the Celestron Lithium 86 Wh.

Celestron Powertank Lithium LiFePO4 84Wh

Celestron Powertank Lithium LiFePO4 84Wh

This new Powertank combines the advantages of lithium technology – high power density, cycle life, better environmental compatibility – with a well thought-out design. Using the supplied Velcro tape, the Powertank Lithium 86 Wh can be simply fastened to the tripod leg.

It not only provides a 12 Volt output voltage for the telescope mount, but is also equipped with charging sockets for your tablet and smartphone.

A cable with utility plug connects the telescope with the Powertank. This standard originating from the cigarette lighter in a car has become well established. Most mounts include a corresponding cable in their scope of delivery. You can, however, also buy the cable separately here.

The Celestron Powertank Lithium 86 Wh also has a torch (flashlight) function, optionally with white or red light. All switches and sockets are protected by hinged lids, making sure that they stay free of dirt or dust during long-term storage.

 

Talking of storage: There is a problem with the classic Powertanks, in that they will fail, if not used for a long time. They suffer self-discharge, which is accompanied by a loss of storage capacity. Starting to use a telescope again after an extended period of not observing the night sky may result in a very unpleasant surprise indeed. In this area – the so-called storage life – the new Powertank Lithium 86 Wh is also superior to its predecessor!