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Celestron RASA Astrographs: Telescopes for Astrophotography

September 20 2019, Stefan Taube

The RASA range of telescopes were developed specifically and exclusively for astrophotography. They are very fast; with a focal length of f/2 they take pictures twenty times faster than a Schmidt-Cassegrain lens at f/10! Because of this a tracking control is not required, and generally fewer demands are placed on the mount!

The RASA 1100 model with a 279 millimetre aperture has already been on the market for some time, and Celestron is now also offering a smaller version, the RASA 800, with a 203 millimetre aperture.

Celestron Astrograph S 203/400 RASA 800

Celestron Astrograph S 203/400 RASA 800

This optical system is also within reach of smaller budgets with the RASA 800, particularly since it can be used with a smaller mount. The illustration above shows the RASA 800 with the AVX mount. This astrograph is optimised for astrophotography cameras with a 22 millimetre field diagonal. The larger RASA 1100 is the better choice for those who prefer to use a DLSR for their photography.

The abbreviation RASA stands for the developers’ names: Rowe-Ackermann-Schmidt-Astrograph. It is basically a normal, routinely-produced Celestron Schmidt-Cassegrain instrument; that is with a spherical primary mirror in front of which is a corrector plate invented by Bernhard Schmidt. Instead of using a secondary mirror to direct the light path towards the Cassegrain focus at the end of the telescope, the camera sensor is incorporated in the prime focus. A corrector assembly comprising four lenses made of especially high-quality glass ensures optimal illumination.

Die RASA-Optik von Celestron

The RASA telescope from Celestron

As the term astrograph implies, RASA telescopes are designed exclusively for photography. There is no option to use an eyepiece. But if you are an amateur astronomer who specialises in astrophotography, you will not see this as a disadvantage, instead you will quickly learn to appreciate the advantages of the RASA telescopes.

125 years of Kowa: TSN-883 Prominar Black Edition spotting scope

September 18 2019, Betty Lux

For its 125th anniversary Kowa presents a new, strictly limited-edition spotting scope model: the TSN-883 Prominar Black Edition. Celebrate with us and secure yourself a piece of sports optics history!

Kowa TSN-883 Prominar Black Edition

TSN spotting scopes are classics from this sports optics manufacturer with Japanese roots. As early as 1894, Kowa began laying the foundations for its expert knowledge in the most diverse fields of science – such as pharmacy, mechanical engineering, textile processing and, of course, in the opto-electronics industry. All Prominar products combine the firm’s accumulated expert knowledge with optimum ease of use and the highest optical quality.

Kowa 1894 – 2019

The unique feature of the Kowa TSN-883 Prominar Black Edition is – as its name suggests – the elegant black colour used instead of the more usual green. Otherwise, it has exactly the same features ​​as the Kowa TSN-883. This means that you also get the scope set with its wide-angle zoom eyepiece and practical neoprene case. All together in a stylish package, which you should secure for yourself right away.

Please note: this special edition is limited to only 500 instruments worldwide, with only 250 of these available in Europe!

50th Anniversary of the Apollo 11 Moon Landing: limited edition T-shirt

July 15 2019, Marcus Schenk

We at Astroshop.de are thrilled – a special anniversary is just around the corner, which no amateur astronomer can miss!

Fifty years ago NASA wrote world history! On 20 July 1969 the first humans landed on the Moon during the Apollo 11 mission.

Although under risky and dangerous circumstances, it worked out: Neil Armstrong and Buzz Aldrin took the first Moon walk and more than 600 million people followed them live in front of their television sets.

Our T-shirt: All the landing sites at a glance

Celebrate fifty years anniversary of the Moon landing with us and show that you are a fan too.  We now offer the new Apollo T-shirt in different sizes, in a very high quality, limited-edition, digital print.

moonlanding t-shirt

What can you see on the T-shirt?

On the front, the T-shirt features an accurate graphical image of the Moon. It also shows you the exact landing sites of the Apollo missions together with their dates. On the back you will find an image of Earth rising above the lunar surface. When the Apollo 8 astronauts happened to see the Earth rise, they captured this magical moment for all of humanity. The photo called “Earthrise” is one of the most iconic images ever shot.

This Apollo Moon T-shirt is only available in limited quantities. Order your Moon T-Shirt now!

PlaneWave Instruments software for computer control of Celestron telescopes

June 26 2019, Stefan Taube

You can rely on PlaneWave Instruments’ professional CPWI software if you want to control your Celestron telescope via a laptop or PC.

This software is not only intuitive to use, but also lets you maximise the GoTo accuracy of your Celestron mount.

CPWI Telescope Control software is now compatible with all modern Celestron mounts, including:

 

You can download the software for free here on celestron.com!

 

Celestron CPWI

PlaneWave Instruments Telescope Control panel

 

Some special features of CPWI software include:

  • The built-in SkyViewer star chart is intuitive to use and allows you to easily navigate through the night sky by clicking and zooming.
  • Advanced PointXP lets you create a highly accurate model of the night sky which uses more than 100 reference points to enable highly accurate positioning and tracking.
  • Ideal for observatories: You can carry out alignment directly from the PC, save the alignment model and simply upload it again the next night you observe. Alignment can also be done entirely automatically using the optional StarSense module.
  • Extensive internal database. Access to the SIMBAD professional astronomy database possible via the Internet.
  • Worm screw periodic error compensation: PEC can be done from the PC via CPWI.

System requirements: Windows 7, 8 or 10 operating system, with USB 2.0 or 3.0 connection, 15MB hard disk space and 64MB RAM. Screen resolution of 1024×768 or higher is recommended.

New: Diamond Steeltrack focuser with Steeldrive from Baader

June 17 2019, Stefan Taube

Diamonds really are astronomers’ best friends – at least since the Baader Diamond Steeltrack focuser has been available. It uses real diamonds in its drive system!

In contrast to conventional Crayford or rack-and-pinion focusers, the Diamond Steeltrack’s micronized drive system guarantees entirely backlash-free operation, is completely non-slip and torsion-free – and has a vertical load capacity of 6 kilograms!

Okularauszug Diamond Steeltrack an einem Celestron EdgeHD

Diamond Steeltrack focuser on a Celestron EdgeHD telescope

There are Diamond Steeltrack focusers available for Schmidt-Cassegrain telescopes, Newtonian telescopes and refractors.

The Steeldrive II motorized focuser drive with hand-held controller is now available:

Baader Fokussiermotor Steeldrive II mit Steuerung

Baader Steeldrive II motorized focuser drive with control unit

The Steeldrive II motorized focuser drive permits automated focusing of a telescope via computer, as well as precise and vibration-free focusing using the buttons on the hand-held controller.

A good focuser considerably enhances observing pleasure and is essential for high-end astrophotography. The Steeltrack focuser is currently the best possible solution available!

 

50th anniversary of the Moon landing: lunar globes of our companion in space

June 11 2019, Betty Lux

Since time immemorial the human race and human imagination have been fascinated by the Moon. Through a telescope or astronomical binoculars it seems so close and yet still it sometimes seems so far away. However scientific knowledge about the Earth’s satellite has multiplied in recent years.

The publishing house Columbus Verlag, one of the very first manufacturers of lunar globes, has created a completely new and revised lunar globe – exclusively for us! Because the relief map is intricately applied by hand, the result is a significantly higher resolution and brilliant image. This lunar globe represents high quality workmanship, made in Germany.

Lunar Globe by Columbus Verlag

What is on the far side of the Moon?

Not only scientifically fascinating, but also decoratively attractive is, for example, the lunar globe “The Moon” from National Geographic. The simple design of the aluminium base and the calming illumination makes this lunar globe a stylish interior accessory. Introduce this inspiring and exclusive ambiance into your home.

National Geographic The Moon

 

With this you can become an astronaut, without leaving Earth

This lunar globe from Sky Publishing with a diameter of 15cm makes a perfect gift for Moon addicts. This model also offers high-resolution image data at an attractive price.

Sky Publishing Mini Moon Globe

 

And if you are looking for something even more atmospheric: we have a Moon Lamp from National Geographic in our range.

National Geographic Moon Lamp

 

Whichever Moon accessory you would like to discover, you can now decide in comfort: here you will find our entire selection in our online shop. By the way we deliver globes free of charge within Germany!

 

Now available: the GreenLine roll-off roof observatory from DomeParts!

May 21 2019, Stefan Taube

We are pleased to offer the roll-off roof observatory GreenLine from DomeParts GmbH – now available at a great price. You can now realise your dream of having your own very own garden observatory. It’s also perfect for astronomy clubs.

The Greenline roll-off roof observatory is available in three sizes:

The larger size GreenLine Plus is perfect for astronomical organisations.

DomeParts GreenLine

A GreenLine observatory in the exhibition area of the astronomy fair AME.

The advantages of a roll-off roof observatory compared to a classic dome observatory are clear:

  • The observatory looks like a typical garden shed and so blends in perfectly in any domestic setting. The wooden GreenLine is not only well-designed, but looks great too.
  • The roof can be fully retracted giving you an unobstructed view of the sky in every direction.
  • The inside of the cabin adjusts quickly to the ambient temperature, eliminating turbulent air currents which can often arise with a dome opening.
DomeParts GreenLine Omegon

GreenLine observatory with an Omegon RC on an iOptron CEM60 mount.

The open roof of the roll-off roof observatory offers plenty of room to manoeuvre even for a large-aperture telescope. Here in the picture the GreenLine observatory is equipped with an Omegon RC Truss telescope on an iOptron CEM60 mount.

The delivery time for a GreenLine roll-off roof observatory is around one month. You can put the observatory together yourself or let our construction team build it for you.  Get in touch with us: We’re happy to give you advice and provide you with a quote.

iOptron mounts: A new addition to the CEM family

April 4 2019, Stefan Taube

CEM series mounts from iOptron are already widely used in the US and are becoming increasingly well known in Europe too. The CEM25P mount for portable astrophotography with Newtonian telescopes of up to 6 inches aperture and the CEM60 mount for use in observatories have proved particularly popular.

With their new CEM40 and CEM40-EC with encoders, iOptron now provides a middle range mount capable of carrying loads of up to 18 kilograms. The CEM40 is hence ideally suited for astrophotography with telescopes of up to 8 inches (200 millimetres) in aperture.

iOptron CEM40

The CEM40 is the latest addition to iOptron’s CEM series

The abbreviation CEM stands for centre-balance equatorial mount, i.e. for equatorial mounts which are supported at their centre of gravity. This design ensures an excellent relation between weight and carrying capacity. The CEM40 weighs only 7 kilograms and yet can carry OTAs up to 2.5 times heavier. The amazing carrying capacity of CEM mounts has been constantly reaffirmed by our customers – especially regarding the CEM25P.

The CEM40 comes equipped with an electronic pole finder, known as ‘iPolar’. A laptop is required to operate this however, so the CEM40 is particularly suitable for astrophotographers who already use a laptop for their camera. iPolar and built-in GPS provide easy and accurate alignment and GoTo computer control initialization.

The encoders installed in the CEM40-EC version ensure very high GoTo accuracy and allow worm gear permanent periodic error correction – a problem that all mounts suffer from. The CEM40-EC does away with the need for guiding with your astrophotography.

The CEM family now covers a wide range of load carrying capacities, offering a suitable model for every budget!

New: NB1 nebula filter from IDAS

March 25 2019, Stefan Taube

Luminescent emission nebulae, supernova remnants and planetary nebulae are all particularly beautiful objects pertaining to the night sky. This applies both to the simple process of visual observation, as well as to astrophotography. Nature illuminates such nebulae in specific spectral colours: the red light of hydrogen, the blue-green light of oxygen ions and also in the colours of sulphur and nitrogen ions.  Nebula filters enable these colours to pass through whilst blocking the diffused light of the natural luminance of the sky and of light pollution. The result is a marked increase in contrast.

With the Nebula Booster NB1, the filter specialists IDAS are introducing a new, very high-performing filter of this type onto the market, and one that is not overly expensive! As the transmission curve shows, the filter has high transmission and is permeable for all relevant spectral lines, with a surprisingly narrow passband: A real nebula intensifier!

Transmission curve IDAS NB1

 

The filter is ideal for photographing large nebula regions since it enables the typical colours of these objects to pass and blocks the disruptive skyglow. The filter quickly and completely cuts off near infrared up to 1100 nanometres. This is important since cameras are sensitive to this range, but telescopic lenses are optimised for the visible spectral range and are faulty in the infrared range.

IDAS Nebula Booster NB1

IDAS Nebula Booster NB1

 

The Nebula Booster NB1 is available with two versions which cover both of the common filter thread sizes and can be screw-fitted to the housings of eyepieces or cameras.

Find the Right Binoculars or Night Vision Device – New Models for 2019!

March 12 2019, Betty Lux

The new year has already arrived. Our binoculars and optical instrument suppliers are also making great headway with a wide range of innovations and new products –

whether bird or nature watching – you can’t go wrong with this all-rounder

Celestron‘s Trailseeker ED binoculars are a brand new article on the market. The popular and already available Trailseeker series  has now been extended with the use of high-quality ED glass. ED glass, also known as ‘Extra Low Dispersion Glass‘ reduces chromatic aberration to a minimum. That is a particular advantage when the lighting conditions are unfavourable, such as in the twilight. Despite it often being good weather in the Spring, it does still get dark quite early. But these binoculars will let you continue observing animals and birds well into the early evening. Savour every minute of your time outdoors in the countryside – your Trailseeker ED binoculars will help you!

Celestron Trailseeker ED 8×42

 

Speaking of the night: how about a night vision device?

Not without reason, the demand for night vision devices is higher than ever. Only a few years ago, these devices were not always particularly technically sophisticated, unwieldy and, most of all, expensive. Thankfully, those days are now over – as with the new Minox NVD 650 night vision device. The 6X magnification, with up to 30X digital zoom, allows you to see details in the dark. But what is really special is its range – with details still visible up to 350m away – putting the Minox NVD 650 firmly in the top echelon of 1st generation night vision devices! The photos and HD videos you take with it can be saved to a Micro-SD card and shown to friends and family later. And, last but not least, the device is really great value for money.

Minox NVD 650 night vision device

 

Hawke Frontier ED X – opens up an entire new world

At around 700 grams, Frontier ED X 10×42 binoculars from Hawke are ideally suitable for the discerning nature-watcher who doesn’t want to miss a thing. Here too, everything is down to the use of low dispersion ED glass together with an extremely compact design. The eyepieces can be pushed together to only 105mm separation. Those who find compact binoculars to be too small and unsophisticated will be more than satisfied with the Frontier ED X. They are nitrogen-filled to prevent fogging and equipped with a high-quality set of accessories, leaving nothing to be desired by the outdoor enthusiast.

AWKE Fernglas Frontier ED X 10x42

HAWKE Frontier ED X 10×42 binoculars

Explore all the new binoculars and optical instruments from reputable manufactures on our website and take advantage of our huge selection. Now is exactly the right time to buy, as availability is short but there is still sufficient stock. In any case, you are bound to enjoy some great moments nature watching!

 

21.09.2019
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