Telescope-Service Eyepiece Filters

Telescope-Service - Your Expert for Telescopes, Mounts, Binoculars, Spotting Scopes and Accessories. We offer a broad selection of eyepieces, filters, accessories for astro-imaging and many more interesting items.

Astronomical Filters

Filters are used in almost all fields of amateur astronomy. The uses are manifold.

On the sun or the moon the primary purpose is to reduce the image brightness, on gas nebulae the purpose is to raise contrast by blocking unwanted light pollution.

Easy Payment: We offer our customers several easy and fast payment methods. You will receive exact payment details when ordering or on request!


TS Colour Filters 1.25" and 2" excellent colour filters - better contrast on the moon and the planets	TS Vartiable Colour And Polarizing Filter ultra-versatile filter for suppression of false colour, reduction of glare and boosting contrast	TS Neutral Filters 1.25" & 2" and Variable Polarizers reduce the image brightness on the moon and the planets to see fine details	Astronomik Nebular Filters different broadband and narrowband nebular filters for visual use and CCD imaging - 1.25" and 2"

BAADER Filters (separate page)	Orion (USA) Filters (separate page)	Baader Solar Filters (separate page)

excellent quality filters Contrast Filter, CCD, False Colour reduction filters for achromatic refractors, ...	Broadband and Narrowband Filters 1.25", 2" and SC Variable Polarizers 1.25" and 2"	Varioius filters for solar observing: White light, contrast filters, K-line, H-Alpha

1.25" & 2" Telescope-Service Colour Filters

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A short comparison between simple but expensive filters and the TS Filters

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Other Filters

Thick ring

Often made of plastic

With eyepieces of 25mm focal length or longer there is a certain amount of vignetting

No filter combinationis possible because filters cannot be screwed into each other

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TS - Filters
Thin metal body with filter threads on both sides.

No vignetting

Combinations of filters are possible

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2" Filters
Like the 1.25" the TS 2" filters have a well-made thin metal body. The advantages are the same

TS Colour Filters
Our TS colour filters offer an excellent value for your money. Naturally they come in beautiful boxes where you can store them safely.

You can use the filters both visually and photographically without reservations.

TS Quality:
- the filter housing is made of metal and as thin as possible to avoid vignetting.
- the glass used in our filters is very homogenous and parallel
- we promise a very good image quality!
- filter threads on both sides allow you to combine different filters. For example, a blue filter and a yellow filter combined resemble a green filter.

Art. No.	Recommended min. Aperture	Recommended for use on...	Price - SEK incl. VAT 1.25"	Price - SEK incl. VAT 2"
Light Yellow	from 50mm	Moon, Mars, comets - you can reduce false colour in Fraunhofer refractors. A nice universal contrast filter, even for small aperture telescopes.	170.-	-
Yellow / Green	from 60mm	Well suited for observations of Jupiter and Saturn. Reveals atmospheric structures even in small aperture telescopes.	170.-	325.-
Yellow	from 80mm	Enhances contrast on the moon, reveals surface details and clouds on Mars, enhances cloud structures on Jupiter (e.g. the Great Red Spot). Can be used in double star observations with refractors - reduces false colour in Fraunhofer refractors.	170.-	325.-
Dark Yellow	from 120mm	Similar to yellow, suitable for bigger aperture telescopes. Removes false colour in Fraunhofer refractors.	170.-	325.-
Orange	from 80mm	Enhances contrast in daytime and twilight observations (Venus, Mercury) by suppressing the blue light. Reveals details on Mars (in larger aperture telescopes). Further details in Jupiter's and Saturn's atmosphere are revealed. You may try spotting atmospheric structures on Uranus with large aperture telescopes.	170.-	325.-
Light Red	from 60mm	For very high contrast on the Moon - suitable for small aperture telescopes. This filter is used when observing the polar ice caps on Mars (100mm aperture and larger). Well suited for Venus by blocking the blue daylight. The sky appears black.	170.-	-
Red	from 80mm	Similar to light red, suitable for telescopes of 100mm aperture and larger.	170.-	325.-
Dark Red	from 120mm	Similar to light red, suitable for telescopes of 150mm aperture and larger. This filter will make for an extreme contrast.	170.-	-
Light Blue	from 50mm	An important universal contrast filter for all telescopes, similar to light yellow. It brings along a gain in contrast on many objects within our solar system.	170.-	325.-
Blue	from 70mm	General contrast gain on the moon, off its terminator. Enhances contrast in Jupiter's and Saturn's cloud bands. Enhances surface details on Mars. In large aperture telescopes you may see cloud details on Venus. Good comet filter - boosts contrast in the comet's tail.	170.-	-
Dark Blue	from 100mm	Similar to blue, suited for telescopes of 150mm aperture or larger.	170.-	-
Violet	from 120mm	Well-suited for observing Venus in telescopes of 150mm aperture or larger. It makes visible the dark clouds in Venus' atmosphere. Boosts structures in Saturn's rings. You may also use this filter on Mercury under good seeing conditions in large telescopes.	170.-	-
Green	from 60mm	An important universal contrast filter. Drastically boosts contrast on the Moon - better contrast even far off the terminator - suitable for low magnifications. This filter is especially effective on Jupiter, revealing the famous Great Red Spot and other reddish details in the Jovian atmosphere. White spots in Saturn's atmosphere are enhanced in telescopes of 200mm aperture or larger.	170.-	325.-
Dark Green	from 100mm	Similar to green, but suitable for telescopes of 150mm aperture or larger.	170.-	-

In order to save on shipping charges we recommend our filter sets: Three, four or six filters of your choice.

Art.No.	Short description	Price -SEK incl. VAT
TSFI Set3	Set of three 1.25" TS colour filters of your choice	445.-
TSFI Set4	Set of four 1.25" TS colour filters of your choice	515.-
TSFI Set6	Set of five 1.25" TS colour filters of your choice	712.-
	Set of two 2" TS colour filters of your choice	515.-

Protective Cases For Filters

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

Variable Colour and Polarizing Filter - TS CC

Top image: variable colour function of the TS CC1 filter.
Lower image: variable polarizer function.

Only one TS CC filter was used for all of the above images. This shows its remarkable versatility.

The available colours and shades of grey are freely adjustable.

We are proud to introduce a sensational new product: The TS Variable Colour and Polarizing Filter. The filter replaces more than eight other filters in function. You will need less filters, and consequently have less filters to carry around or buy in the first place. The filter can be adjusted freely so you get a very broad variety of uses.

1) Variable Polarizing Filter For Reduction of Glare and Image Brightness
used for observing the moon and planets. Transmission approximately between 15 and 80%.

2) Variable Colour Filter For Suppression of False Colour in Refractors
- All refractor telescopes have to a varying degree a certain colored fringe around bright objects. This fringe generally has a yellowish or violet coloration. The TS CC can be adjusted to match the telescope, eyepiece, object and observing conditions to suppress this false color. At the same time the coloration of the image remains as minimal as possible.

3) Variable Colour Filter for Boosting Contrast on the Planets
The TS CC filter is particularly suited for boosting contrast on Jupiter and Saturn, both of which being planets with a generally yellowish surface color, as well as Mars and Venus which react favorably to a blue/purple setting of the filter.

4) Usable in Nearly All Telescopes
- the filter is simply screwed into the 1.25" filter thread of your eyepiece or camera adaptor. It can be adjusted to optimally match each telescope.

Item No. Short description Price - SEK incl. VAT

TS CC 1 TS Variable Colour and Polarizing Filter - with plastic case for safe storage.
Including English manual. 460.-

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

Neutral Filters (1.25" and 2") and Variable Polarizing Filters

Bilder

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Graufilter - von links nach rechts:
TS ND-0,9 TS ND-0,6 TS ND-0,3

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TS Pol - Polarisationsfilter - einzeln

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FXP - Kombination aus zwei Polfiltern
in einem Gehäuse - verstellbar

Polarizing Filters and Neutral Filters for 1.25" Eyepieces

With these filters you can reduce the brightness of an object - usually the moon or a planet - in order to enhance the ability to see fine details. The filters are screwed into the eyepiece's filter thread. There is no distracting colour like in cheaper green moon filters.

You can combine the neutral filters and the polarizers with TS colour filters (see description above). With their thin metal bodies there will be no vignetting - even with long focal length 1.25" eyepieces.

Recommended Use:
On bright objects like the Moon or the planets (but also during terrestrial observations) you will find that it is necessary to reduce the brightness in order to see further details. In large telescopes observing comfort will rise drastically - you will not feel blinded.

Transmission means how much of an object's light passes the filter. 25% means that one quarter of the light will pass the filter, three quarters are blocked.

Art. No.	Trans mission	Short description	Price - SEK incl. VAT
TSND03	50%	Neutral filter for small telescopes up to 80mm aperture	190.-
TSND06	25%	Neutral filter for telescopes from 90mm to 115mm aperture	190.--
TSND09	13%	Neutral filter for telescopes from 120mm to 200mm aperture	190.-
TSND13	8%	Neutral filter for telescopes with an aperture of 200mm or larger	190.-
TSPOL	20%	Polarizing filter - like a light neutral filter. Variable transmission in combination with a Herschel Prism (solar observations)
AnFXP	1%-40%	Variable polarizer consisting of two polarizing filters in a special body - you can easily adjust the transmission according to your needs	485.-

Protective Cases For Filters

2" Neutral Filters

These filters are like the 1.25" neutral filters, but suitable for 2" eyepieces or 2"-1.25" adaptors with 2" filter thread - that way you can change the eyepieces quickly without having to change the filter.

The filters have a filter thread at both sides - you can combine them with colour filters

Art. No.	Trans mission	Short description	Price - SEK incl. VAT
TSND062	25%	Medium neutral filter - recommended for the moon and the planets, but also for splitting double stars.	402.-
TSND092	13%	Strong neutral filter - recommended for the moon or the sun (only in combination with a Herschel Prism or another dedicated solar filter!	403.-

Protective Cases For Filters

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

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Astronomik Filters

- 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

Please choose one of the following Astronomik filters:

UHC Nebular Filter
Universal
Nebular Filter

O-III Nebular Filter
recommended for Plantary Nebulae

CLS Nebular Filter
for astro-imaging and small aperture telescopes

H-Beta Filter
high contrast filter
for particular objects

H-Alpha Filter
for b/w imaging of H-2 objects

IR Cut Filter
for CCD imaging

Interference Colour Filters
for CCD

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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 small telescopes (starting around 80mm with some objects).

Art. No.	Short description	Price - SEK incl. VAT
ASUHC1	UHC narrowband filter - 1.25"	1020.-
ASUHC2	UHC narrowband filter - 2"	2360.-

Protective Cases For Filters

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

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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.

Art. No.	Short description	Price - SEK incl. VAT
ASO31	O - III narrowband filter - 1.25"	1020.-
ASO32	O - III narrowband filter - 2"	2360.-

Protective Cases For Filters

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

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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 on more objects and smaller telescopes. The filter lets pass 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%.

Art. No.	Short description	Price - SEK incl. VAT
ASCLS1	Filter for reduction of light pollution - 1.25"	725.-
ASCLS2	Filter for reduction of light pollution - 2"	1640.-

Protective Cases For Filters

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

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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.

Art. No.	Short description	Price - SEK incl. VAT
ASHB1	H-Beta Filter 1,25"	1425.-
ASHB2	H-Beta Filter 2"	2360.-

Protective Cases For Filters

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

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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.

Art. No.	Short description	Price - SEK incl. VAT
ASHA1	H-Alpha Filter 1.25"	1425.-
ASHA2	H-Alpha Filter 2"	2775.-

Protective Cases For Filters

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

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.

Art. No.	Short description	Price - SEK incl. VAT
ASIR1	Infrared cut filter - 1.25"	505.-
ASIR2	Infrared cut filter - 2"	1020.-

Protective Cases For Filters

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

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Astronomik Interference Colour 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. Used on the moon and the planets these filters will make for very contrasty images.

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.

Art. No.	Short description	Price - SEK incl. VAT
ASRot1	Interference Filter Red Type 2 - 1.25"	815.-
ASRot2	Interference Filter Red Type 2 - 2"	1290.-
ASGruen1	Interference Filter Green Type 2 - 1.25"	815.-
ASGruen2	Interference Filter Green Type 2 - 2"	1290.-
ASBlau1	Interference Filter Blue Type 2 - 1.25"	815.-
ASBlau2	Interference Filter Blue Type 2 - 2"	1290.-
ASRGB1	Interference filter set 1.25" - (Red, Green, Blue, IR Cut)	2595.-
ASRGB2	Interference filter set 2" - (Red, Green, Blue, IR Cut)	4735.-

Protective Cases For Filters

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

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