Shopping cart
is empty

Archive for 2021

New CMOS-optimised line filters from Baader

July 1 2021, Stefan Taube

The manufacturer Baader presents new filters for astrophotography in the spectral lines H-alpha, OIII and SII.

Filtersets

The half-width of the narrowband filters is 6.5 nanometres, and for the ultra-narrowband it is as little as 3.5 to 4 nanometres. The f/2 filters are optimised for very fast astrographs such as Celestron’s RASA optics.

All filters are available in standard sizes:

cmos-filter-groessen

With a line filter, astrophotography of luminous nebulae is possible even under a light-polluted city sky! These filters only allow those wavelenghts of light in which the selected celestial object shines to fall on the camera sensor. All other wavelengths are blocked. This produces high-contrast images of planetary nebulae, supernovae remnants and star-forming regions.

Three types of line filters are used in astrophotography, each of which is transparent to the brightest spectral lines of oxygen, sulphur or hydrogen atoms. Depending on the astronomical object, a single filter may be enough for a spectacular image. Combining three shots, each taken through a line filter, creates an ideal result.

The new generation of Baader CMOS-optimised filters is characterised by, among other things:

  • Reflex-Blocker™ coatings, for maximum insensitivity to retro-reflection from adjacent auxiliary optics, even under the most adverse conditions.
  • FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and S/N ratio.
  • Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflections due to light falling onto the edges of a filter.
  • Each filter is coated individually, with sealed coating edges.
  • Life-Coat™: Hard coatings to enable a non-aging coating for life – even in the most adverse environments.

Baader-Filter-Technologien

You can find all the new filters here in the shop.

A review of Omegon’s 2.1×42 wide-field binoculars by Sky&Telescope

June 24 2021, Marcus Schenk

This Omegon 2.1x42mm star field binoculars is a great instrument for observing star fields, extended nebulae and entire constellations. Dennis di Cicco reviewed the Omegon star field binoculars for the astronomy magazine Sky&Telescope.

With a 42mm aperture and a magnification of 2.1x, the star field binoculars are truly remarkable. They offer a new observing experience that was previously not possible with binoculars and telescopes. This is also a reason why Sky&Telescope took a close look at this instrument. Among other things, the magazine liked its simplicity and compactness, the huge field of view, and the deep view of the sky. The author of the review was able to fully capture the constellations of Swan, Orion, Gemini, Wagoner, Perseus and others, as well as some deep sky objects or double stars like Algol.

Testbericht Omegon Sternfeldglas

Here are some quotes from the actual review:

Very well made

Excellent aid for learning and enjoying the night sky under less-than-ideal conditions

The Omegon 2.1×42 Binoculars are definitely a joy to use

I was seeing stars more than 1.5 magnitudes fainter in my suburban sky

Whether on vacation or on a hut tour through the Alps, the Omegon star field binoculars make beautiful observations possible even where you have no room for a telescope or binoculars. They also serve as a small observation treat from time to time. There is always a place in the (travel) bag for these Omegon 2.1×42 star field binoculars.

Omegon Advanced 150mm: now with 2″ focuser

June 16 2021, Marcus Schenk

The Omegon Advanced 150/750 EQ-320 telescope is a popular instrument offering an introduction to the exciting hobby of astronomy. With a new, large focuser, you can now even use 2″ eyepieces. For stunning observing and almost limitless views of the cosmos.

2" Okularauszug beim EQ-320 6"

Until now, observers using the Advanced 150/750 EQ-320 have only been able to use 1.25” eyepieces and accessories, but with the new 2″ Crayford focuser (patent pending), you will literally grow your horizons. This gives you the freedom to choose the eyepieces and accessories you want to use.

These are advantages the focuser offers:

With the 2″ eyepieces available in our shop, you can reach a larger area of the sky than is possible with 1.25″ eyepieces. For example, you can capture full-size large nebulae or enjoy seemingly never-ending vast fields full of stars. It also makes it easier for you to find objects. In short, a 2″ focuser is a blessing for deep-sky observers who want to experience the skies as if through a panorama window.

What if you complement the standard 1.25″ eyepiece, as supplied, with a  2″ eyepiece? The Omegon SWA 32mm 2″ eyepiece offers a fantastic image and a real wow-effect for deep sky observing.

Smooth mechanics for precise focusing

Such large focusers are quite unusual for a 150mm Newtonian telescope. However, our development department wanted to ensure that even owners of medium and compact telescopes could benefit from wide-angle eyepieces. In contrast to a normal geared focuser, the new 2″ Crayford focuser with ball bearings runs totally free of play. This allows you to focus your object smoothly and with high precision.

The advantages of the Advanced 150/750 EQ-320:

  • Experience sharp and clear objects: with the parabolic primary mirror
  • 2″ Crayford focuser (patent pending) for 1.25″ and 2″ eyepieces: you can connect additional accessories at any time – even from other manufacturers
  • Equatorial mount: so that you can precisely track celestial objects
  • Trouble-free start in the sky: complete telescope with two eyepieces
  • Find objects easily and successfully with an illuminated LED finder
  • Immediately recognise stars, planets and nebulae – even if you’re an absolute beginner

The Advanced 150/750 EQ-320 telescope is available with immediate effect with a 2″ focuser.

Build your own OpenAstroTech mount!

June 11 2021, Stefan Taube

A photo mount allows you to track the rotation of the night sky on a camera equipped with a photo lens or a small telescope. This allows for long exposure shots of large areas of the night sky.

The manufacturer OpenAstroTech now offers a very functional, yet particularly inexpensive variant of a photo mount. The OpenAstroTracker is a mount you can build yourself!

Der OpenAstroTracker mit Kamera und optionalem Autoguider

The OpenAstroTracker with camera and optional autoguider

Building the mount yourself is not only fun and educational, you also get a powerful GoTo mount at an extremely low price thanks to the DIY approach!

Some of the features:

  • GoTo: The mount comes with full, computer-control functionality. The electronics are compatible with commonly used astronomy software.
  • Suitable for DSLR cameras with a maximum total length of 35cm (camera body with lens). The maximum recommended focal length without autoguider is 200mm.
  • High-precision stepper motors: GoTo positioning accuracy of approx. 1 arcmin, tracking accuracy of 25 arcsec, guided accuracy of approx. 1 arcsec.

What you will need: A USB power bank able to deliver at least 5V 1A

The OpenAstroTracker is available in different latitude setting versions. We will supply you with a set that allows you to set up the mount for a latitude of either 35° to 45° or 45° to 55°.

Der Bausatz OpenAstroTracker

The OpenAstroTracker kit

No need to worry: The electronic components are all designed for easy use. No soldering is necessary.

A matching DIY autoguider is also available as an option: OpenAstroGuider V2

Astro-highlights – Summer 2021

June 4 2021, Marcus Schenk

A solar eclipse after six years, the large planets in opposition and the August meteor shower is visible without any moonlight.

If you’re not looking at the stars this summer, you’re missing something. The sky chart “Astro-highlights – Summer 2021” shows you all the significant celestial events at a glance so that you don’t miss anything. Additional information about these events can be found below the graphic.

We wish you lots of observing pleasure!

June

10/6 Partial solar eclipse

The last partial solar eclipse in Europe was visible on 20 March 2015. The Moon covered up to 80% of the Sun’s disk then. The next solar eclipse occurs on 10 June. It is an annular solar eclipse visible in Greenland and Northern Canada, and partially visible in Central Europe. It is relatively unspectacular, only covering a few percent of the Sun.  The further north you are, the higher the degree of the eclipse. In Munich, only 6.3% of the lunar limb touches the Sun, whereas in Hamburg it is 17.3%. The eclipse begins at 11:35a.m. and ends at 13:22 (depending on the exact location). Caution: Only observe the Sun with a suitable solar filter, which you can purchase from our online shop.

Degree of coverage at our Astroshop sites:

Landsberg, Germany: 6.56%

Marseille, France: 2.7%

Malaga, Spain: 1.3%

Warsaw, Poland: 9.9%

Hasselt/Genk, Belgium: 14.9%

Aveiro, Portugal: 9%

Palermo, Italy: 0%

12/6 The Moon meets Venus

The faint waxing crescent Moon and brilliant Venus appear low to the west shortly after sunset. To the upper left, you will discover Mars. If you are observing with binoculars, a short diagonal sweep to the upper left will bring you to the Beehive Cluster M44.

13/6 The Moon meets Mars

Today the Moon rises higher and joins the planet Mars, which it passes at a distance of 1.8 degrees. Both make a beautiful view through binoculars.

27/6 June Bootids

The June Bootids meteor shower originates in the Boötes constellation. The number of falling stars is small but variable. There have been years in which no meteors were sighted at all, but there have also been occurrences of 100 per hour. This meteor shower is exciting and worth taking a closer look at.

27/6 The Moon meets Saturn

Those who want to see the big gas giants will have to wait until midnight in June. Saturn is currently in the constellation of Capricorn, the horned mountain goat that climbs the meridian at the peak of the sky before dawn. The Moon passes Saturn today at a distance of about 9 degrees.

29/6 The Moon meets Jupiter

On its way along the ecliptic this morning, the Moon passes about 5 degrees below Jupiter. The large differences in brightness between the Moon, Jupiter, Saturn and the brightest stars are interesting to observe.

July

8/7 The Moon meets Mercury

Mercury hovers low over the horizon in the morning sky for the next few days. We can observe it with a perfect horizon view well after 4a.m., close above a flat landscape. The crescent Moon joins it 2.5 degrees above. The new Moon is in two days’ time.

12/7 The Moon meets Venus and Mars

As dusk falls, the Moon and the two planets Venus and Mars make for a delightful sight. The pouncing Leo seemingly about to snap at the three objects. You can admire both celestial bodies through binoculars in one field of view. It’s also a great opportunity to take a photo at dusk.

18/7 Pluto in opposition

Pluto is a dwarf planet that is not easily visible and a challenge for larger telescopes.  Once the 9th planet, it was stripped of its planetary dignity in 2006, but of course our enthusiasm for the solar system’s outpost remains undiminished. If you want to set your sights on it, the best time to do so is during its opposition. Use your GoTo mount’s controller and a star chart to distinguish it from the background stars.

Coordinates for GoTo controller (23:59 CEST): RA: 19h49m59s, Dec: -22°38′

19/7 Golden Handle

The Golden Handle of the Moon? It does exist, but only during a certain lunar phase. Appearing like a handle of light, it is an effect caused by light on the lunar surface, along the terminator line. We are gazing at the Mare Imbrium in the Sinus Iridum crater region and the Montes Jura. Here, the sun rises at the day-night boundary. While the crater is still in darkness, the peaks of Montes Jura catch the sunlight at their summits. A golden ring in the darkness. Best seen between 18:00 and 21:30 CEST.

20/7 The Moon meets Antares

This evening, the Moon remains to the east of the star Antares. It is a red supergiant and shines bright with a reddish hue in the night sky. Its diameter is 700 times greater than that of our Sun and it would swallow some planets, including our Earth, if it were to take the place of our own celestial body.

21/7 Venus meets Regulus

With a good view of the horizon, you will discover Venus at the foot of the constellation Leo after sunset. In the immediate vicinity you will find the star Alpha Leonis, better known as Regulus. The name means  “little King” or “prince”. If you’re thinking of little Simba and the Lion King, you’re probably right.

24/7 The Moon meets Saturn

Shortly before midnight, the constellation of Capricorn appears above the horizon. It is easily recognised by its bowl-like shape. The Moon passes below Saturn at a distance of 4.6 degrees on this night. If you focus on Saturn with binoculars, you will notice a magnitude 5.8 star on your left.

25/7 The Moon meets Jupiter

One day after its encounter with Saturn, the Moon meets Jupiter in the constellation of Aquarius. On this night, the two celestial bodies are separated by 5.5 degrees. Next month, the two gas giants will be in opposition to the Sun.

28/7 Delta Aquariids

The Delta Aquariids are a meteoroid stream that appear to originate in Aquarius. With around 25 meteors per hour, however, it trails far behind the August meteor shower in terms of prominence. Because the Moon phase is very high, the only suitable time for observation is before moonrise.

August

1/8 Jupiter’s moon Ganymede covers Europa

If you take a look through a telescope after Jupiter rises, you will notice the two moons of Jupiter, Europa and Ganymede.  Like double stars, they appear close to each other. At 0:00 CEST, Ganymede partially obscures the somewhat smaller Europa, and at around 2:00 CEST, the two moons go their separate ways again.

2/8 Saturn in opposition

Due to the low position of the ecliptic plane, Saturn has remained low above the horizon in recent years. In 2019, it reached a height of about 20 degrees. During its opposition this year, we can observe it at an altitude of 24 degrees. Over the next few years, Saturn will continue to climb higher. The higher its position, the less we have to contend with atmospheric air turbulence.

On 2 August it reaches its opposition and shines brightly in the sky with a magnitude of 0.1. In doing so, it competes with the brightest stars. We recognise it by its yellowish colour and calm glow. Its ring opening is 18 degrees and if we look at the ring system from the north, we can easily identify the Cassini division.

11/8 The Moon meets Venus

A gaze into the evening twilight is well worth it, Venus shines brightly low in the west with the narrow crescent Moon just above it.

12/8 Perseids

Enjoy the most beautiful shooting stars of the year. The Perseids can be seen at their best this year, there will be a new Moon and dark skies all night while we observe them. The meteor shower is most intense during the morning hours of 12 August. At this time, up to 100 shooting stars fall through our atmosphere each hour at a speed of approximately 216,000 km/h. The best observation time is between 22:00 and 4:00 CEST.

18/8 Mars meets Mercury

An extremely close encounter for seasoned observers. At dusk on 18 August, Mars and Mercury meet only about 3 degrees above the horizon. The sun is barely below the horizon at this time.

20/8 Jupiter in opposition

You can already see Jupiter rising flat in the east at twilight, at magnitude -2.8, a bright object that is hard to miss. But the evening sky has even more to offer in terms of conspicuous objects; the moon and Saturn in close proximity and radiant Venus close above the western horizon.

Today, Jupiter draws all the attention – it is in opposition to the Sun and can be admired all night long. It is now separated from Earth by 600 million kilometres and the light takes just over half an hour to reach us. Its apparent diameter is 49″, it reaches its meridian passage and thus its best visibility and highest position at 1:14 CEST.

Taurus Dobsonian telescope with PushTo

April 15 2021, Stefan Taube

The Polish telescope manufacturer Taurus is offering digital setting circles (DSCs) for upgrading their Dobsonian telescopes. This accessory provides the telescope with constant information about the position of its axes. If you simply connect your smartphone to the telescope, in a planetarium app you can see which area of the sky your telescope is looking at.

Taurus Dobson mit DSC-System

Taurus Dobsonian with DSC system

Of course, its inverse application is more interesting: Find an interesting object in the planetarium app and let your smartphone show you how you should move the telescope in order to observe this object through the eyepiece. This approach is also known as PushTo. You can find all PushTo telescopes here in the shop.

Taurus Bluetooth & WiFi PushTo DSC System

The Bluetooth and WiFi DSC system in detail

Your Taurus telescope can be fitted with a DSC at any time. However, we also offer all models with pre-installed DSC here: Taurus Dobson telescopes with PushTo.

Alongside the DSC encoders, Taurus also offers two other upgrade options:

These accessories can also be delivered pre-installed so that you don’t have to get your hands dirty.

In order not to get lost in the extensive selection of Taurus Dobsonians, you can tell which accessories are pre-installed by the product name:

  • Telescopes with the abbreviation SMH in their name are equipped with secondary mirror heating (SMH).
  • Telescopes labelled DSC (short for digital setting circles) are compatible with PushTo.
  • If the product name includes CF, the primary mirror is fitted with a cooling fan.

For example, the Taurus Dobsonian N 504/2150 T500 Professional SMH DSC CF features secondary mirror heating, digital setting circles and a primary mirror cooling fan.

We will gladly help you to select the right Taurus Dobsonian telescope for you. What you also need is a little patience as your Dobsonian is only manufactured when you place your order – they don’t stock mass-produced telescopes.

The little one with the turbo: the new and fast Omegon Astrographs

March 26 2021, Marcus Schenk

The new Astrographs from Omegon are special telescopes for full-frame cameras, and offer high light-gathering capabilities. With the dizzyingly fast aperture ratio from f/2.8 to f/3.2, you can take astronomy photos with extremely short exposure times.

Pole position on your mount

This telescope doesn’t need to warm up, it’s ready to go immediately for fast astrophotography. The 6-inch and 8-inch astrographs with f/2.8 and f/3.2 are about three times faster than a normal f/5 Newtonian telescope. This means you can take astronomical photos much quicker, and minimise tracking errors.

Short focal length, large field of view

Wide-field astrophotography is gaining ground and has a very large fan base thanks to mounts such as the MiniTrack. But with this telescope, you can go a step further into the detail and capture wide nebulae and create fantastic wide-field images.

Full speed for full-frame

With a 3-inch focuser, the built-in 3-inch corrector and a 90mm secondary mirror, the Omegon Astrograph illuminates a 44mm image circle, making it perfect for using with a full-frame, high-resolution camera. With a working distance of 55mm, you do not need any additional distance adapters for DSLR cameras. With the Omegon Telescope Pro Astrograph N200/640 OTA, you have a screen diagonal of about 3.8 degrees, with a standard full-frame sensor. This makes the California Nebula in Perseus, the Andromeda Galaxy or the area around the Veil Nebula amazing destinations.

Elegant carbon tube

The new astrograph not only looks elegant and high-quality, it actually is. The carbon tube offers you the additional advantage of stable focus, because the material is particularly thermally-stable.

The models are available in the following variants:
Omegon Telescope Pro Astrograph N150/420OTA
Omegon Telescope Pro Astrograph N 200/640 OTA

Do you want to explore new horizons in astrophotography? Then get to know the Omegon Astrograph.

Astronomik MaxFR: Narrow band line filter for fast scopes

March 25 2021, Stefan Taube

The new filters in the MaxFR range are optimised for astrophotography using very fast telescopes, such as the Celestron RASA scopes or the Takahashi Epsilon astrographs.

Astronomik has made these filters available for the three most important spectral lines, namely OIII, H-alpha and SII, each available in half widths of 12 and 6 nanometres.

Astronomik Filter H-alpha 12nm

An H-alpha clip filter for Canon cameras from the MaxFR range

When you observe beneath brightened skies, astrophotography with line filters provides you with the best opportunties to capture successful images. Generally, an H-alpha filter is the first sensible purchase: Using this filter, you can effortlessly capture detailed images, even during the full Moon or beneath heavily brightened skies! It is also the correct filter for all nebulae which emit red light.

The OIII filter significantly increases your options as it enables all green/blue structures to be captured in detailed and high-contrast images. Planetary nebulae and star formation regions are especially rewarding targets!

The SII filter then completes your filter set, and enables you to create the same colour photographs as the Hubble Space Telescope using the three channels!

Which half width is right? In short, the use of 12 nanometre filters is ideal for DSLR cameras and all dark-current-limited cameras. Further suppressing the sky background using a narrower half width does not create more detail with these cameras. The 6 nanometre filters are the right choice for locations with more light pollution and for cameras with extremely low dark current, for example cameras with very good cooling. Especially in very starry regions of the Milky Way, the 6nm filter can also capture weak objects in high-contrast without them becoming lost in the mass of stars.

You can find an overview of all filters in the range here.

Set your sights on an even wider range of Omegon Pro Apochromats now

March 24 2021, Marcus Schenk

Omegon’s fleet of Pro Apochromats has been strengthened. The range has been supplemented by equally stylish and powerful refractors that perform far better than ordinary refractors.

Omegon’s new apochromats were developed for ambitious astrophotographers who want to take brilliantly-sharp photographs of the universe. These apochromats deliver superb image sharpness and wonderful contrast across the entire field and will help you take the perfect photo. These instruments are equipped with ED lenses, integrated correctors, CNC tubes and large focusers. All for stunning image sharpness.

Whether it’s a compact 61mm instrument for travel or a 140mm flagship model, you can choose from a range of options to suit your specific mount and needs. You can also choose between doublet, triplet, quadruplet and quintuplet apos, models with two, three, four or even five lenses.

Many instruments can also be ordered with an individual optical test report;  a seal of quality for your telescope that also permanently increases its value.

The Andromeda Galaxy

And here is the fleet of telescopes at a glance:

  1. Apo 61/335 ED Doublet OTA #65141

A portable and compact apochromat that’s got it going on: The 61mm apo is small, yet it features a high quality 2.5″ focuser with a 1:10 reduction. Even at this size, it’s all premium quality.

  1. Apo 61/274 ED Doublet OTA #69472

Large optics aren’t always crucial, because there’s no substitute for a dark and crystal-clear sky. But this can sometimes be cumbersome to access with large optics. If you like to travel and shoot large-area objects, you will love the 61/274 ED Doublet.

  1. APO 72/400 Quintuplet ED OTA #65156

Perfect, true-colour images of ultra-sharp stars right to the edges: The 72/400 Quintuplet achieves this with ease. With a total of five lenses, two of which are ED lenses, it offers exceptional contrast with a fully-corrected and flat field of view.

  1. APO 76/342 Triplet ED OTA #69473

This apo will accompany you wherever your journey takes you. Weighing in at just 4 kilograms and only 333 millimetres long, this telescope can also be used with travel and mini mounts. This telescope is a true master of its craft when it comes to wide-field images and targets, such as the Andromeda galaxy. The 76mm triplet also makes an excellent telephoto lens for nature photography.

  1. APO 76/418 Triplet ED OTA #65142

Like the previous apo, this one also delivers an impressive image, but with a slightly longer focal length. Both 76mm units have a 3″ rack and pinion focuser with a 1:10 reduction.

  1. APO 80/500 Triplet ED OTA #60856

An apochromat with a clear and true-colour image, even at very high magnifications. The beautifully-crafted focuser is 2.5″, larger than that of most 80mm telescopes. The advantage: so much illumination that even your full-frame camera will have fun with it.

  1. APO 94/517 Triplet ED OTA #65147

The 94mm aperture allows you to quickly and easily photograph astronomical objects and celestial events. The 94/517 Triplet is superbly-crafted and features two ED elements within the triplet design. This produces a clear and true-colour image of bright stars or the lunar limb. This telescope also cuts a perfect figure for visual observation at high magnifications. Definitely a hot tip for apo lovers.

  1. APO 100/580 Quadruplet ED OTA #60854

This quadruplet apochromat has four lens elements. It offers both superb imaging and a corrected flat field of view. This means that you no longer need to adapt any correctors, because the optics already reveal sharp stars right to the edges. The 3.5″ focuser provides plenty of options for connecting other accessories. This apochromat also fully illuminates the field of view of full-frame cameras.

  1. APO 121/678 Quintuplet ED OTA #65143

With five lenses for stunning images, the 121/678 is not only fast, but also offers outstanding optical performance. What does that mean? A triplet apo lens for true-colour images and an additional two-lens flattener for a flat field. With 60mm field illumination, this telescope is also perfectly suited for very large sensors. An immense backfocus of 145mm and a 4″ focuser offer the possibility to connect heavy cameras and various accessories.

  1. APO 140/910 Triplet ED OTA #65144

A triplet apochromat with two ED lenses at the front and rear of the objective.  It provides exceptionally-good colour correction. With a 4″ R&P focuser and 44mm image circle, this telescope is also suitable for full-frame cameras. A premium instrument for anyone who cares about luminous intensity.

Are you an astrophotographer looking for the perfect instrument? You might want to take a closer look at these apochromats.

Vixen Foresta II 8×56 ED binoculars on special offer!

March 23 2021, Stefan Taube

The Japanese manufacturer Vixen now offers these premium ergonomic ED binoculars at a bargain price: Buy them for just 449 euro and get 200 euro off the regular price!

Vixen Fernglas Foresta II 8x56 ED

Vixen Foresta II 8×56 ED binoculars

The objective lenses employ ED (extra-low dispersion) glass for amazingly sharp contrast and bright images.

The large aperture lenses gather light efficiently even for low-light observing, making these binoculars ideal for astronomers and birdwatchers alike.

This pair of binoculars weighs 1.2 kilograms, so you might want to use a tripod with a tripod adapter.

You’ll find more information about the binoculars here. This offer is only valid while stocks last!

31.07.2021
We ship worldwide
Currency
Service
Advice
Contact
Universe2Go