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Posts Tagged 'telescope'

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.

Improved Version of the Dobson LightBridge by Meade

February 7 2019, Stefan Taube

No other telescope produces the natural experience of the night sky as directly as a Dobson. Completely without a camera or any other electronic deflection – armed only with an infra-red lamp and star chart – discover nebulae, star clusters and galaxies.

Apart from good weather, two things are necessary to enjoy observation: As large a telescope as possible and a dark night sky. A Dobson is a reflector telescope with a relatively simple base. So, for your money, you’ll get a telescope that is bigger than others. The problem with the dark sky is, however, more difficult to solve. The Dobson telescope should fit in a car so you can drive to a good location for observing.

A large telescope that fits in a car is a contradiction in itself. This is resolved by the Dobson wire-mesh tube:

Gitterrohrdobson

This Dobson in the LightBridge series can be taken apart without tools.

As the figure shows, the telescope can be taken apart into relatively small parts. From left to right, you can see the rocker box, the mirror case, the tube rods and the carrier ring with the secondary mirror. On location, the truss tube Dobson can be built in a few minutes without any tools.

The manufacturer, Meade, was one of the first, with the Dobson telescopes in the LightBridge series to use this form of construction and at a price that is affordable for amateur astronomers. We can now offer the improved version, the LightBridge Plus.

Meade Dobson Teleskop N 254/1270 LightBridge Plus

Meade Dobson Telescope N 254/1270 LightBridge Plus

The new LightBridge Plus has an improved rocker box. It is somewhat lighter, has notched carry handles, a pre-installed eyepiece tray and a friction brake for the height axis. The box can be taken apart without tools so it can be easily transported. Meade now fits these telescopes with an improved eyepiece holder that has a fine-adjustment knob for precision focusing and comes with a high-quality 2-inch eyepiece with a 26-mm focal length.

As with the previous version, the LightBridge Plus has a main mirror fan for faster alignment of the mirror with the ambient temperature. As expected, the optics are fully adjustable. Thanks to the fast aperture ratio, the tube is relatively short and the viewing height at the zenith is not too high.

If you’ve always wanted a telescope with a large aperture, but just didn’t know how you’d carry it around, a LightBridge Plus is a very good choice at a fair price!

 

Now Available: New Meade Telescopes of the Series LX65 and LX85

December 6 2018, Stefan Taube

The almighty has crossed the pond: the brand-new Meade telescopes of the Series LX65 and LX85.

Meade LX65 Maksutov

Meade LX65 Maksutov

The Meade Maksutov Telescope MC 127/1900 UHTC LX65 GoTo is immediately available and thanks to its high focal length is excellent for lunar and planetary observations.  The optics capture enough light, that even far-off objects show details, such as star clusters.

As with every LX65, this telescope features an azimuthal single-arm mount, which is light, easy to disassemble and even has an integrated battery compartment.  The AudioStar Handheld Controller makes it a breeze for beginners to find their way around the sky, while the database features more than 30,000 objects.  Conclusion: An excellent telescope for beginners or planet specialists, who are looking for a transportable telescope.

The LX85 Series has just arrived with several models.  These telescopes are delivered with the new LX85 mount.  As compared to the LX65, the LX85 series features a parallactic mount.  This sort of build features an axel which is parallel to the Earth’s axis, a trick which prevents the celestial objects from drifting in the telescope.  Such a feature is extremely important for longer exposures in Astrophotography.  The LX85 is an inexpensive mid-sized mount, which also has an AudioStar controller.

Meade-LX85-150mm

Meade LX85 Newton

The Meade Teleskop N 150/750 LX85 GoTo is available now.  Equipped with a Newton-style telescope with a 150 mm diameter, it features a parabolic mirror with 750 mm focal length.  The combination of 150/750 is very popular and can be found in nearly every telescope brand.  The mirror is big enough to be able to observe faint galaxies under a dark sky.  The quick focal ratio of f/5 makes it great for photography.

The LX85 is also available as a Newton Telescope with 200mm Mirror. For purely visual observations, it is a great choice, while a 150 mm Newton telescope would be less ideal for astrophotography, since stability is so important in taking photos.

For friends of lens-based telescopes, we offer Achromats, namely the Meade Telescope AC 120/700 LX85 GoTo and the Astrograph AP 70/350 Series 6000 LX85 GoTo. Last but not least, we also offer something special for astrophotography, which is also available without a mount: Meade AP 70/350 Series 6000 Astrograph OTA.

Meade-APO-Sky

The New Astrograph from Meade

This very interesting set-up for astrophotographers even received the Hot Product 2018 Award from Sky & Telescope!

Since we are on the subject of photography, we would like to share two camera tips from Meade: Have a look at version 4 of the legendary Deep Sky Imager.  The cooled cameras can be used universally.  The price-worthy LPI-G Cameras meanwhile are real planetary specials and perfect for beginners.

 

Meade-LPI-G-Blog

LPI-G Camera on a Meade Apo

The LPI-G-Kameras can also arrive just in time for the holidays!

High-value Telescope with Many Possibilities: 150-Mm Newton with New EQM-35 Mount by Skywatcher

September 14 2018, Marcus Schenk

Are you looking for a decently priced telescope to start out in astronomy that will not only impress you right from the start, but that will offer opportunities for many years? A Newton telescope on a mount with computer control is an excellent choice!

We are offering you the N 150/750 PDS Explorer BD EQM-35 PRO SynScan GoTo telescope by Skywatcher at the moment for only €998 – a complete system for astronomy for less than one thousand euros!

 

N 150 750 EQM-35

This mirror telescope, based on an idea by Isaac Newton, is an especially good value for the telescope structure. The main mirror, with a diameter of 150 mm, gathers enough light for visual observation. The relatively short focal length of 750 mm ensures that the tube is short. This means the telescope is easy to carry under a dark sky. The small focal length is also good for photography. The N 150/750 PDS Explorer piece of optical equipment for astrophotography is perfect, for example, for a high-quality eyepiece holder with reduction.

The computer-controlled EQM-35 mount by Skywatcher is a new and improved version of the classic EQ-3 with a higher load capacity. The special highlight of the EQM-35 is the removable declination axis:

 


EQmM-35

This means you can use the EQM-35 with a telescope or as a photo mount  with a SRL camera.

You can, of course, connect the same camera to the telescope. With this telescope, you can encapsulate the world of low-light, small objects astrophotografically, such as planetary nebulae and globular clusters. If you take off the telescope and disassemble the declination axis, you can make atmospheric wide-angle shots of the night sky with a photo lens.

In addition to purely visual observation with an eyepiece, these two photographic uses offer almost unlimited possibilities – and we haven’t even talked about photographing the moon and planets with a planetary camera. This telescope doesn’t restrict the ways in which you can experience your hobby of astronomy!

You can find more information here!

The new Gran Turismo 81 Apochromatic Refractor by William Optics

August 24 2018, Stefan Taube

William Optics, the specialist for high-quality lens telescopes, is bringing a very interesting “photo machine” to the market with the Gran Turismo GT 81. This refractor features a travel telescope forma-factor, so it’s still easy to handle – a real dream for astrophotographers!

The GT 81 is fitted with a three-element lens that ensures high colour correction and ultra-sharp depiction. In addition to the usual high-quality workmanship of William Optics, the equipment of this apochromatic refractor is worth looking at: A high-quality eyepiece holder, pre-mounted guide scope rings and a prism rail. A special highlight is the patented focus mask that is also included in the scope of delivery.

We are offering a matching guidescope and a field flattener with this telescope. With the Gran Turismo 81 by William Optics, you’ll be receiving a high-quality piece of optical equipment for life-long fun with astrophotography!

New: Star Discovery telescopes by Skywatcher with a smartphone app

June 25 2018, Stefan Taube

An increasing number of telescopes can be controlled with a smartphone. The advantages are obvious: Smartphones offer, with their colour display, touchscreen and GPS mobile, more possibilities and are more intuitive to operate than a classic hand-held controller. The app can be kept constantly up-to-date and the telescope can be controlled wirelessly.

So, the manufacturer, Skywatcher, now offers its azimutal one-arm mount, Star Discovery, without a hand-held controller only. Instead, a Wi-Fi module is included, with which the smartphone can be linked. The telescope can then be controlled with the free SynScan app.

At the moment, Skywatcher is offering the Star Discovery mount with two telescope optics. We can recommend in particular the Star Discovery P1 50i:

Star Discovery P1 50i

The 150/750-Newton optic of this telescope has proven to be valuable for beginners and can be used in many variants. With a mirror diameter of 150 mm, objects from the Deep Sky guide can be viewed, but it is also a pleasure to observe the Moon and the planets with this telescope! Thanks to the relatively small focal length of 750 mm, the telescope is still very compact and transportable.

Those who prefer to observe with a classic telescopic lens should get hold of a Star Discovery 90i. Thanks to its deep eyepiece, it is especially suitable for children.

Both optics can be removed from the mount by way of a handy screw to they can be transported. The Star Discovery has a classic prism rail connector thanks to which almost any small telescope optic weighing up to five kilogrammes can be secured. The mount is also an attractive option if you already have a telescope.

Take another look in the App Store for the SynScan app. You can get the right telescope from us.

New Skywatcher Apochromatic Refractor: EvoStar ED 72 DS Pro

March 29 2018, Stefan Taube

The telescopic lens tubes in the EvoStar series by Skywatcher have been greatly appreciated telescopes for years for both beginners and advanced users.

With the EvoStar 72, the Skywatcher now offers a dual-lens ED apochromatic refractor at a good price: You can purchase the EvoStar 72 ED DS Pro OTA for just €349.00!

EvoStar 72
The very decently priced EvoStar 72, thanks to its short design, is the ideal instrument for travel, but more than that, it’s great for constellation astrophotography. You only need a small parallactic mount with a load capacity of 5 kg.

The apochromatic refractor has a double lens made from particularly tough ED glass. High-quality glass by Schott is used for the crown glass element. Every glass-air surface of this optical item is fitted with a metallic anti-reflective coat to achieve high maximum light transmission of 99.5 %! The optical construction of this apochromatic refractor considerably reduces chromatic aberrations and creates a much sharper image!

The apochromatic refractor comes with a carry case and a sensitive eyepiece holder with 1:11 reduction. For visual observation, you will also need a zenith mirror and eyepieces. You can find these in the “Recommended accessories” section for EvoStar 72.

We will be pleased to advise you personally!

New Explore Scientific Dobson with 20-inch mirror!

March 6 2018, Stefan Taube

With the Ultra Light series, Explore Scientific is offering telescopes with the Dobson construction that can be taken apart easily for transportation. This means you can travel to dark observation sites with Dobson telescopes. For an unimpeded look into the night sky!

The latest model in the series has a 20-inch mirror: Dobson N 500/1800 Ultra Light telescope.

ES-500-UL

It’s no longer quite so ultra-light. There needs to be two of you to set it up at the observation site. But apart from that, it can be taken apart into practical parts just like the smaller models.

Other features of the Dobson N 500/1800 Ultra Light Hexafoc telescope:

  • Truss tubes made from solid aluminium: Very high level of stiffness
  • Main and secondary mirrors made from quartz with a test certificate
  • Low viewing height of just 1.63 m at the zenith
  • The main mirror can be adjusted from the top, and hence, during observation
  • Very transportable thanks to the small packaging dimensions
  • Large 2.5-inch eyepiece holder with 1:10 fine adjustment
  • Large powder-coated adjustment wheels for wobble-free tracking

The telescope is made in Hungary and Germany

“Hot Product 2018” by Sky & Telescope

February 9 2018, Stefan Taube

At the beginning of each new year, the magazine Sky & Telescope features interesting product developments. The criteria are innovation, an elegant solution to a typical problem, or the particularly high quality of a product.

We would like to present from this long list of “Hot Products 2018” those that we also considered to be particularly noteworthy:

 

Explore Scientific GoTo control PMC-8 with WIFi

ES-PMC-8

The company, Explore Scientific, has developed a control system that, in conjunction with the app, ExploreStars, enables wireless control of astronomical mounts via a smartphone, tablet or other mobile device. You will receive this control system in combination with two tried and tested mounts with completely different load-bearing capacity, namely:

 

Stargate Dobsons by Skywatcher

Stargate-Dobson

For the purists who would rather invest in optics than in electronics, the Skywatcher Dobsonian N 458/1900 StarGate-450P telescope is a dream! The Dobsonian telescope with truss tube, mirrors and a lightweight construction collects a great deal of light, but despite its size, it is still relatively easy to transport.

Sky&Telescope awarded both motorized Stargate versions with GoTo control:

They are equipped with the tried and tested SynScan control system, which helps you to find celestial objects and then automatically guides the telescope.

Mini Star Adventurer by Skywatcher

Mini Star Adventurer

Camera mounts have taken a positive development in recent years. Thanks to the high demand for this very immediate method of astrophotography, manufacturers are always coming up with new innovations. Sky & Telescope awarded the Mini Star Adventurer by Skywatcher. This mount also creates its own WIFI, so it can be controlled via the app. This eliminates the need for a manual control box; control is done wirelessly – and thus vibration-free – and the clear graphic user interface can be used for adjusting your mobile device.

Things that make the life of astronomers easier and lovelier

Orion Astrolampe

The many smaller things on which Sky & Telescope has bestowed the Hot Product Award 2018, include the Astro Lamp by Orion, which, of course, can also be operated with glare-free red light. The editors of the magazine also like:

  • Diagonal mirror with TwistTight fixation for 1,25″ and 2″ connector diameter, also by Orion. This special fixation centres the accessory, keeps it secure, won’t scratch, and can be screwed in place while wearing gloves.
  • The “bible” for one of the most powerful astrophotography programs Inside PixInsight by Springer Verlag. The book is available in English, and is very popular. The book is published in the Practical Astronomy
  • Sky & Telescope has also awarded its own Globes. At least for the Pluto Globe, this is most justified. The globe shows the spectacular view of the dwarf planet, Pluto, as the New Horizons spacecraft revealed in 2015.

Mount and accessories for observatories

Paramount Taurus

We can help you with advice and support for your observatory project. This also includes the high-end products by Software Bisque. So, we are pleased that Sky & telescope has awarded the recently developed bracket mountings, Paramount Taurus.

The Spanish company, Lunático, is making a useful accessory for observatories. Its remote control, Dragonfly, has made it to the list of Hot Products 2018.

Every year, it is interesting to see what products the well-known magazine, Sky & telescope, will award – and we are pleased that every year, these award-winning products are already part of our offer.

Telescope bundles: These telescopes will turn you into a “professional” astronomer

January 26 2018, Marcus Schenk

New astrographs and RC optics come as complete telescopes with mounts by Skywatcher and iOptron. Both manufacturers are known for their sturdy mounts that are loved by astrophotographers. Important principle: Having the right equipment is essential for quickly becoming successful in astrophotography. With these telescopes, you’ll be able to achieve that.

You, of course, also need practice: But with this equipment, your frustration will turn to a passion for the stars. Discover the new combinations with which you’ll shine at the next telescope meeting.

Omegon Astrographen mit Montierungen

Our experienced astronomy experts have put together a telescope collection and combined both tube types with appropriate mounts. The benefit: Now, you can simply select your telescope in the shop without having to worry about getting the right mount.

There is a wide selection available: They range from small, transportable optics to large observatory telescopes. And you have everything together: They are so sturdy that they make astrophotography simply fun.

Omegon astrographs in 8 different versions

In the “Pro Astrograph” category, you can choose from four different astrographs with a diameter of 154 mm, 203 mm, 254 mm or 304mm. All optics have a super-fast f/4 aperture. This means: These Newton telescopes are fast. Short exposure times and large fields of view at reasonable prices are the main strengths of these optics.

There are eight different full telescopes to choose from, which means two different mounts per tube size.

Astrograph 254/1016 EQ6-R Pro

Omegon RC telescopes in 11 different versions

Among the Omegon RC optics you can choose from six different tubes: three full tubes measuring 154 mm to 254 mm, and three-truss, wire-mesh tubes measuring 304 mm, 355 mm and 406 mm. This means we have the right telescope size for all astrographs.

You can, for example, use the smallest RC telescope with an EQ-6R Pro mount by Skywatcher. An ultra-sturdy combination that can also take other accessories. Or treat yourself finally to your dream observatory with a 16” truss RC on a 10-micron mount. By the way: We would also be glad to plan your entire observatory.

Pro Ritchey-Chretien RC Truss Tube 304/2432 GM 2000

These telescopes look great, but are also a dream for all astrophotographers. For it’s possible to take better astrophotos with these “photo instruments”. Finally, it is no wonder that almost all professional observatories use RC telescopes.

Why not set up an astrophotography master in your own garden? Order now, or if you have any further questions: simply give us a call.

20.10.2019
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