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Filters are the salt for astronomical observing and imaging. A selection of good quality filters can improve observing quality and fun greatly!
- precisely polished parallel surfaces
- perfect light transmission tailored to the needs of the visual or photographic astronomer
- dielectric coating - even after several years the filters will still be like new
- the filters do not age
- the filters are fully water-resistant, perfectly suited for outdoor use (which is where you will use them, after all)
- all filters come in nice and safe transport boxes
Visual Filters
Medium nebular filter.
Suitable for telescopes with 100mm aperture and larger
Light nebular filter.
Suitable for telescopes up to 100mm aperture
Strong nebular filter.
Suitable for telescopes with 150mm aperture and larger
Light nebular filter.
Suitable for telescopes up to 100mm aperture
Strong nebular filter.
Suitable for telescopes with 250mm aperture and larger
Photographical Filters
Medium and strong filters for DSLR and CCD cameras
Blocks IR, permits UV. For many photographical applications
Blocks IR and UV. For many photographical applications
Colour filters and filter kits for CCD photography
Light filter for DSLR cameras

Astronomik filters.
Ideal for demanding users.
 Astronomik UHC Filter

These filters are among the best nebular filters available. They suppress any annoying stray light, letting pass only the specific O-III (planetary nebulae), H-Alpha and H-Beta (emission nebulae, like the North America Nebula) spectral lines. With these filters you will see that successful Deep-Sky observations can also be made near cities.

Furthermore the filters are very robust. You may try to clean them even with less than perfect cleaning methods without damaging them. While other filters might be scratched the Astronomik filters will still be in a perfect condition. Also, the filters do not age, you can use them for many years without them showing any less (or worse: more) than on the first night.

Quite frequently "fast" telescopes suffer from a loss of light when using nebular filters. Astronomik has managed to reduce this effect to a minimum. The UHC filter is more versatile than the O-III filter and can be used successfully in smaller telescopes (recommended for 100mm aperture and larger). For even smaller telescopes we recommend the UHC-E filters.
Item No Short description Price - SEK incl. VAT
ASUHC1 UHC narrowband filter - 1.25" 1025,-
ASUHC2 UHC narrowband filter - 2" 2060,-

Protective Cases For Filters

Please send requests or online orders to: sales@teleskop-service.se

Astronomik filters.
Ideal for demanding users.
 Astronomik UHC-E Filter

Astronomik UHC-E filters are similar in overall function and performance to the classical UHC filters. They suppress any annoying stray light, letting pass only the specific O-III (planetary nebulae), H-Alpha and H-Beta (emission nebulae, like the North America Nebula) spectral lines. With these filters you will see that successful Deep-Sky observations can also be made near cities.

But the UHC-E filters were made for smaller telescopes up to 100mm aperture. They permit more light, resulting in brighter images. Classical UHC filters have a larger contrast gain, but are only suitable for larger telescopes.
Item No Short description Price - SEK incl. VAT
AS UHCE 1 UHC-E filter - 1.25" 675,-
AS UHCE 2 UHC-E filter - 2" 1295,-

Protective Cases For Filters

Please send requests or online orders to: sales@teleskop-service.se

Astronomik filters.
Ideal for demanding users.
 Astronomik O-III Filter

The Astronomik O-III filters are of the same high quality as the well-known UHC filters. They supplement the UHC's ideally. When it comes to planetary nebulae, or gas nebulae like the Veil nebula, Astronomik O-III filters are most effective.

While UHC filters can be used on small-aperture telescopes we recommend the use of O-III filters in larger telescopes (200mm aperture and larger, 150mm with some objects). If you have such a big telescope, though, nothing will surpass the contrast you get with the O-III on countless emission nebulae and planetary nebulae.
Item No Short description Price - SEK incl. VAT
ASO31 O-III narrowband filter - 1.25" 1025,-
ASO32 O-III narrowband filter - 2" 2060,-

Protective Cases For Filters

Please send requests or online orders to: sales@teleskop-service.se

Astronomik filters.
Ideal for demanding users.
 Astronomik CLS Filter

This "Minus City Light" filter is similar in function to the UHC filters. But they are not as narrow and will let more light pass the filter. This makes the CLS filters especially interesting for the following uses:

- - small aperture telescopes (starting from 60mm) or use with extremely high magnifications, where the UHC swallows too much light.
- drastic reduction of false colour in refractor telescopes
- contrast gain with many objects within our solar system

The filter will not enhance contrast as much as the UHC and O-III filters do, instead the CLS is more versatile and can be used with some success also on objects where UHC and O-III filters do not perform well (galaxies, ...) The filter permits H-alpha, H-beta and O-III.

The CLS filter is especially interesting for astrophotographical purposeses.
Here the effect is similar to the much more expensive Lumicon Deep Sky filter. Exposure times increase by a factor of between 2.2 and 2.7x, background illumination is reduced by 70%.
Item No Short description Price - SEK incl. VAT
ASCLS1 CLS Filter for reduction of light pollution - 1.25" 715,-
ASCLS2 CLS Filter for reduction of light pollution - 2" 1645,-

Protective Cases For Filters

Please send requests or online orders to: sales@teleskop-service.se

Astronomik filters.
Ideal for demanding users.
 Astronomik H - Beta Filter

The Astronomik H-Beta filter is a true narrowband filter, having a bandwidth of only 14nm around the H-beta center wavelength (489.1nm). You get extremely good results with hydrogen nebulae like the California Nebula or the famous Horsehead Nebula.

Additionally the filter is very interesting for photographical experiments, especially using CCD equipment.

Used with a 250mm (10") aperture telescope the filter will - very dark sky background provided - show the Horsehead Nebula in its characteristic shape. The H-Beta filter is a perfect mate for the UHC and O-III filters.
Item No Short description Price - SEK incl. VAT
ASHB1 H-Beta Filter 1.25" 1030,-
ASHB2 H-Beta Filter 2" 2060,-

Protective Cases For Filters

Please send requests or online orders to: sales@teleskop-service.se

Astronomik filters.
Ideal for demanding users.
 Astronomik H - Alpha

The Astronomic H-Alpha filter has a very small bandwidth of only 15nm around the center wavelength of 656.3nm. H-Alpha is the most common wavelength of hydrogen nebulae. The filter is used on the well-known H-II objects, the red emission nebulae.

This is a photographical filter. If you use a CCD camera or a hyper-sensitived TP-2415 film in combination with the Astronomik H-Alpha filter you will get an extreme contrast gain. Even from light-polluted areas like large cities you can take extremely high contrast images of objects like the North America Nebula.

Important note: All Astronomik filters, including the H-Alpha filter, are true interference filters, not simple colour filters. This means much more precise transmission curves and consequently less unwanted and more wanted light.

The Astronomik H-Alpha filter is not a solar filter! Do not mistake it with the much more expensive Coronado filters.

Two Variants
Astronomik offers two variants of the H-Alpha filters.
- The 13nm version is for classical photography and DSLR cameras.
- The 6nm filter offers an even greater contrast boost, but should only be used with astronomical CCD cameras.
Item No Short description Price - SEK incl. VAT
ASHA1 H-Alpha filter 13nm - 1.25" 1240,-
ASHA2 H-Alpha filter 13nm - 2" 2885,-
ASHA 6nm 1 H-Alpha filter 6nm - 1.25" 1955,-
ASHA 6nm 2 H-Alpha filter 6nm - 2" 4425,-

Protective Cases For Filters

Please send requests or online orders to: sales@teleskop-service.se

Astronomik filters.
Ideal for demanding users.
 Astronomik IR Cut Filter

An important tool for CCD imaging. The transmission of visible light is 97% with maximum transmission at H-Alpha (656.3nm). All infrared light is cut out completely up to over 1200nm. The filter has a dielectric coating, is scratch-resistent and doesn't age. You need this filter whenever there is any glass element (objective lenses, barlow lens, corrector lenses, eyepieces) between the camera and the object.

L-Filter
A variant of the filter is the Astronomik L-Filter ("L" for Luminance). It is similar in all basic specs to the IR cut filter, but also cuts off the ultraviolet part of the spectrum.
Item No Short description Price - SEK incl. VAT
ASIR1 Astronomik IR cut filter - 1.25" 510,-
ASIR2 Astronomik IR cut filter - 2" 1025,-
ASL1 Astronomik L-Filter (IR & UV cut) - 1.25" 820,-
ASL2 Astronomik L-Filter (IR & UV cut) - 2" 1295,-

Protective Cases For Filters

Please send requests or online orders to: sales@teleskop-service.se

Astronomik filters.
Ideal for demanding users.
 Astronomik Interference Colour Filters / LRGB Filters for CCD Imaging

Interference Colour filters are especially suited for CCD imaging. You can take impressive, true-colour composit images with monochrome CCD cameras such as the ATiK cameras. Compared with a colour camera you get an increased contrast and better raw images for image processing.

Each Astronomik colour filter blocks infrared light. That way you do not need the otherwise obligatory IR cut filter. Transmission curves are very precise and far more efficient than common colour filters. Excellent transmission of desired wavelengths is the result.
Item No Short description Price - SEK incl. VAT
Filter Sets
AS RGB 1 LRGB filter set 1.25". Consists of red, green, blue and L-filter 2575,-
AS RGB 2 LRGB filter set 2". Consists of red, green, blue and L-filter 4750,-
Single Filters
AS Rot 1 Astronomik Red filter type 2 - 1.25" 820,-
AS Rot 2 Astronomik Red filter type 2 - 2" 1295,-
AS Gruen 1 Astronomik Green filter type 2 - 1.25" 820,-
AS Gruen 2 Astronomik Green filter type 2 - 2" 1295,-
AS Blau 1 Astronomik Blue filter type 2 - 1.25" 820,-
AS Blau 2 Astronomik Blue filter type 2 - 2" 1295,-

Protective Cases For Filters

Please send requests or online orders to: sales@teleskop-service.se