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Stefan Taube

Stefan Taube

Posts composed by Stefan Taube

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.

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

Special gift ideas for astronomers and nature watchers

December 7 2020, Stefan Taube

Are you looking for a little something? We are offering you selected gifts for young and young at heart nature fans.

To help you make your choice, we have grouped our gift ideas as follows:

Our specific recommendations from these categories:

For astronomy beginners

Omegon-150-750

Omegon Telescope N 150/750 EQ-3

The Omegon Telescope N 150/750 EQ-3 is a very popular beginners telescope, with which the highlights of the night sky can be observed easily.  Star clusters, the Orion Nebula, the Andromeda Galaxy, the Moon and the planets are all within the capabilities of this beautiful instrument.

For amateur astronomers

Omegon ADC

Omegon ADC Atmospheric Dispersion Corrector

Advanced observers will love the Omegon ADC Atmospheric Dispersion Corrector. Behind this somewhat long-winded title, lies an accessory that allows planets and other objects, even those close to the horizon, to be observed in sharper focus. This is a particularly useful and reasonably-priced tool for planetary astrophotography.

For nature fans

Omegon Fernglas Talron

Omegon Binoculars Talron HD 8×42

Omegon Binoculars Talron HD 8×42  belong in every home.  Equipped with these you can take a quick look at birds in your garden, and you’ll want to take them with you when you next go for a walk or a hike. The binoculars offer a sharp image which, at eight times magnification, remains steady when hand-held.  They are easy to carry and, thanks to the large focus wheel, comfortable to use.

For children and the young

Omegon-70-700

Omegon Telescope AC 70/700 AZ-2

The Omegon Teleskop AC 70/700 AZ-2 is a classical refractor telescope, which is especially suited to children and the young. The low eyepiece position is easy for children to reach, and the operation of the telescope is particularly intuitive.  Due to the favourable focal ratio it is possible to view the Moon and bright planets without annoying colour aberrations. But you can also enjoy observing star clusters and the Orion Nebula using this telescope.

That special gift

Oklop Leinwanddruck Orionnebel M42

Oklop Orion Nebula M42 Canvas Print 50cm x 75cm

Talking of the Orion Nebula: this beautiful celestial object is also available as a high quality canvas print. You can find further images in this range of prints from Oklop here in our shop.

We hope you enjoy browsing through our gift ideas!

The SkyGuider Pro camera mount from iOptron is now available with an electronic polar finder

January 8 2020, Stefan Taube

The SkyGuider Pro is a very light mount on which you can set up a camera with interchangeable lenses or a small telescope. This approach allows longer exposure times and so you can create fascinating wide-angle shots of the night sky.

iOptron Montierung SkyGuider Pro iPolar Set

iOptron Mount SkyGuider Pro iPolar Set

The SkyGuider Pro is now also available as a set together with the iPolar electronic polar finder, which has been built into the mount. With this accessory, you can easily and very precisely polar-align your mount.

The electronic finder has a built-in camera. This shows the position of the northern celestial pole and the location that the polar axis of the mount is pointing at, on your laptop. Simply bring the two points together by turning the adjustment screws for the azimuth and altitude axes of the mount – and you’re done!

SkyGuider Pro mit iPolar

SkyGuider Pro with iPolar

The location of the celestial north pole differs somewhat from the location of the Pole Star. The electronics calculate the exact position using the date and time. Thanks to the sensitivity of the camera and the large field of view, this so-called polar alignment is successful even when the mount has been only roughly positioned. This also works in the southern hemisphere and even takes into account atmospheric refraction at low latitudes!

If want to do without iPolar, you can of course still purchase the SkyGuider Pro mount without the electronic polar finder here.

New Smartphone Mount by Celestron: NexYZ

August 28 2018, Stefan Taube

The trend of using smartphone cameras for photography with optical instruments has remained steady. This is, of course, an obvious choice because everyone has this camera with them, ready to send pictures; and these cameras are always improving. The large range of smartphone mounts  has been extended by Celestron, adding a very interesting model.

NexXY

The  Celestron NexYZ is not only particularly robust; it can be adjusted in all three axes using a rotary knob. This means you’ll be able to set the perfect distance between the eyepiece and the adapter. This feature, in combination with the ease, with which the smartphone can be changed, is interesting for public shots at observatories, because all visitors want to take their personal moon photo home with them.

NexYZ-1

The clamp of the NexYZ adapter is also wonderfully suited for use on spotting scopes.

NexYZ-2

With the NexYZ adapter, we are offering you a smartphone holder with the usual clever design by Celestron.

Observe the night sky with Celestron SkyMaster binoculars!

June 4 2018, Stefan Taube

For many observers is not a telescope, but rather a pair of binoculars that is used as the main optical instrument for exploring the night sky. That is, after all, only logical as real nature lovers are already equipped with binoculars.

Observing the night sky with the binoculars is more than just a compromise – binoculars, with their wide field of view and using both eyes, do have certain advantages over a telescope. And as binoculars are always close at hand in the truest sense of the expression, they follow the golden rule of observing the night sky – the best optical instruments are the ones that are used the most.

The SkyMaster series from the American brand Celestron are extremely popular binoculars often chosen for astronomical observing. These astronautically optimized binoculars offer a generous aperture at a great price.

For successfully getting started observing the night sky with binoculars we recommend the SkyMaster 15×70 SkySurfer set. You get it for the very affordable set price of only 133 Euros!

SkyMaster 15x70 SkySurfer Set

In addition to the binoculars, you also receive a SkySurfer III red-dot finder from Baader, which will help you to orientate yourself in the night sky. The red dot finder projects a red dot onto a transparent window. This lets you see which part of the night sky the binoculars are pointing at and lets you orient yourself using a star chart.

The set also includes is the particularly sturdy Stronghold-Bino tripod adapter from Baader. Unlike the usual adapters made of plastic or aluminium this adapter is made of steel, ensuring that your binoculars are held really firmly and safely on the tripod.

This offer is valid until August 31, 2018. And if you buy the Celestron SkyMaster 15×70 SkySurfer Binoculars set before 27.07.2018, you will be able to observe the lunar eclipse on this date. So make sure you grab yours in time!