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Posts Tagged 'telescope-accessoires'

Higher contrast for comet hunters: C2 Swan Band filter

September 29 2023, Stefan Taube

CS-Band-Filter

German manufacturer, Baader, has produced a new filter for 511 and 514 nanometre spectral lines which is available to fit both available filter thread sizes:

These Swan Band emission lines, which are named after their discoverer, are produced by carbon. They make up the majority of a comet’s gas tail in the visible spectrum. The filter only allows light from these two carbon wavelengths to pass through and blocks the ever-present light pollution. Structures within a comet’s gas tail, therefore, become more pronounced even in good observing conditions.

At the same time, it blocks the 501 nanometre OIII spectral lines. This increases contrast and makes it easier to distinguish comets with gas tails from comets with dust tails.

Both C2 Swan Band filters belong to Baader’s new CMOS-optimised filters:

Telescopes for children and young people: 3 perfect present ideas – Video with English subtitles

December 2 2022, Marcus Schenk

Looking for a present for your children? In this video, we give you tips and advice to help you find the right telescope. We have selected three different models, which are suitable for beginners. Additionally, we show you which accessories you realistically need. Watch the video and discover the fascinating world of astronomy with your family!

Products shown in the video:

AC 90/1000 EQ-2 telescope

Omegon Advanced 130/650 EQ-320

Omegon 152/1200 Advanced Dobsonian

17.5cm rotating star chart

Astronomy torch Astro-Flashlight

Book for children and young people 

Cronus eyepieces

Back in stock: Baader FlipMirror II

November 9 2022, Stefan Taube

Multiple faces – multiple uses

Baader’s multi-purpose flip mirror is back in stock! In combination with its level camera connector, the FlipMirror II offers a third connector, ideal for accessories such as off-axis guiders or calibration lamps for spectrographs.

63172_1

 

The FlipMirror II can be permanently mounted on the telescope as its optical finish is comparable to that of a high-quality zenith mirror. The flip mirror can also be used for visual observation.

Why do you need a flip mirror?

Unfortunately, every telescope only has one connector on the eyepiece side despite there being a large range of accessories that you may want to connect: eyepieces, cameras, off-axis guiders, guiding eyepieces, spectrographs and many more. For astrophotography and spectroscopy, these components need to be mounted at the same time.

The FlipMirror II provides more opportunities for this than other flip mirrors and it also provides solid screw adaptors. This is why multiple thread adapters are included amongst the accessories.

Baader_Flip-Mirror

 

The new Herschel wedge from APM for solar observation

May 12 2022, Stefan Taube

A Herschel wedge, also known as a Herschel prism, is a special device for observing the Sun. It has many advantages over an objective filter, but can only be used with lens telescopes (refractors).

The manufacturer APM offers a new model with excellent features at a reasonable price: the APM Herschel wedge 2″ with Fast-Lock.

Herschelkeil APM

This Herschel wedge from APM is equipped with a ceramic light trap, an integrated ND3 filter and a replaceable polarising filter. All filters are of course multi-coated! Image brightness can be adjusted by rotating the polarising filter. This means that the Herschel wedge can be used for both visual and photographic purposes!

The APM Herschel wedge is equipped with a quick release (Fast-Lock) eyepiece adapter and an adapter for 1.25″ eyepieces and camera connectors.

Herschelkeil

Using a Herschel prism for solar observing is not only safer, but also qualitatively better than a foil filter. The resulting image is sharp and rich in contrast and can therefore be enlarged to a higher degree.

The Herschel wedge can only be used on refractors with an aperture of up to 150mm.

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.