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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 |
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New Telescope-Service Online Shop:
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Visual Filters
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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 |
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Photographical Filters
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Medium and strong filters for DSLR and CCD cameras
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Blocks IR, permits UV. For many photographical applications
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Blocks IR and UV. For many photographical applications
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Colour filters and filter kits for CCD photography
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Light filter for DSLR cameras
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Canon EOS Insert Filters / Clip Filters Dust protection and astrophotographical filters for Canon EOS cameras. You have a Canon EOS digital SLR camera (300D, 350D, 400D, 20D .... et al.) and also use it for astro-imaging? Then you probably know the usual problems: -- good quality screw-in type filters are quite expensive -- often there is no sufficient back-focus to install filters at all, e.g. when using an Off Axis Guider. -- it is difficult to keep the proper distance between a coma corrector and the camera's sensor when using a conventional filter adaptation. This problem concerns everybody, not only amateur astronomers: -- when changing the lens or during astro-imaging the camera's sensor is unprotected! Dust can settle on the sensor and is then difficult and dangerous to remove. The EOS Insert Filters are the Ideal Solution !!! |
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 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. |
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Please send requests or online orders to: sales@telescope-service.com |
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 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. |
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Please send requests or online orders to: sales@telescope-service.com |
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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. Astronomik O-III CCD Filters Astronomik O-III CCD filters are optimized for photographic use. They offer very high contrast with monochrome CCD cameras. |
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Please send requests or online orders to: sales@telescope-service.com |
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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: The CLS filter is especially interesting for astrophotographical purposeses. |
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Please send requests or online orders to: sales@telescope-service.com |
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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. |
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Please send requests or online orders to: sales@telescope-service.com |
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 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 12nm 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. |
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Please send requests or online orders to: sales@telescope-service.com |
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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. |
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Please send requests or online orders to: sales@telescope-service.com |
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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. |
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Please send requests or online orders to: sales@telescope-service.com |
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