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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.

Sale: astronomical filters and eyepieces on special offer!

June 15 2021, Stefan Taube

Available immediately: large selection of

at special reduced prices!

For example:

Omegon Pro LRGB Filter 1,25''

Omegon Okular Ortho 16.8 mm 1,25''

Omegon Super LE Okular 9mm 1,25
All sale items can be found here in our shop.

The products in this sale are brand new. This offer is valid only until 31.07.2021 while stocks last. Grab a bargain now!

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

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.

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.

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!

Explore Scientific: Guidescope and finderscope in one

February 9 2021, Stefan Taube

Small telescopes which are mounted parallel to the telescope fulfil two purposes: as a finderscope, they help the observer to navigate the night sky, whilst as a guidescope, they help with the astronomical mount’s precise tracking.

Explore Scientific Guidescope 8x50 Helikal

Explore Scientific 8×50 helical guidescope

The manufacturer, Explore Scientific, has produced two models which superbly meet the requirements for both of these:

Both scopes are equipped with a removable eyepiece. Without this eyepiece, they can be used as a guidescope with a helical focuser. They use a guiding camera with a mating dimension of 1.25”. With the aid of the guide sleeve clips, the guidescope can be aligned to a guide star. The camera keeps this firmly in view and corrects minute mount errors using drive pulses.

Using the eyepiece, small telescopes are converted into high-quality finderscopes, producing images vastly superior to standard finderscopes. The eyepiece is fitted with an illuminated crosshair.

Abnehmbare Okulareinheit

Removable eyepiece

Thanks to this practical solution provided by Explore Scientific an auxiliary telescope is only required for different applications.

New: StarAid Revolution standalone autoguider

January 21 2021, Stefan Taube

Autoguiding is understood to refer to the automatic monitoring of the tracking of astronomical mounts. This monitoring is required for astrophotography in order to keep the targeted object steady on the camera’s sensor.

There are a multitude of cameras available for autoguiding, however they require a laptop or PC and suitable software. Now, standalone solutions are coming out which do not require these supports. The latest innovation in this field is the StarAid Revolution autoguiding camera. Tracking monitoring is extremely simple using this!

StarAid-Kamera-Standalone-Autoguider-Revolution-Revision-B

StarAid Revolution standalone autoguider revision B

Plug & Guide: Connect the camera to your guide scope, connect it to your mount via the guide port, and voila! The camera kicks into action after around 30 seconds and sends corrective impulses to your mount’s motors.

But the StarAid Revolution can do even more: For example, polar alignment, the precise alignment of your mount with the Earth’s rotational axis. It is even possible to control the astronomical camera. An app is available for these additional options and also to monitor the tracking. In order to allow you to connect your smartphone to your autoguider, the StarAid Revolution creates its own WiFi network.

Revolution is a big word. Here, it really does apply!

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!

New: Skywatcher Star Adventurer with Wi-Fi

October 16 2020, Stefan Taube

The manufacturer Skywatcher has now equipped its Star Adventurer with Wi-Fi. This means that the popular photographic mount can now be controlled conveniently and most importantly, remotely, using a free app.

The set also includes a polar wedge, a counterweight and an L-bracket.

What hasn’t changed is the proven concept: the Star Adventurer allows the tracking of the night sky with a camera. In this way, long-exposure images of the night sky can be taken without a telescope, simply through the camera lens. Such photographic mounts are enjoying ever-increasing popularity. The Star Adventurer is one of the larger models with a load capacity of five kilograms.

We offer the Star Adventurer as a photographic set with practical accessories, or in the standard configuration . All you need is a photographic tripod and of course a camera. However Skywatcher itself also offers a tripod for the Star Adventurer.

As far as the camera is concerned, we offer a wide range of DSLR cameras which are specially modified for astrophotography.

25.07.2021
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