The 13 Best Telescope Filters in 2021

Our Top Picks of Best Telescope Filters

1. Best for versatile use: Thousand Oaks Optical 4″x4″ Solar Filter Sheet for Telescopes
2. Best for observing the moon: Celestron 94105 Neutral Density Moon Filter
3. Best for observing the celestial view of the moon: 1.25” Orion 13% Transmission Moon Filter
4. Best for night sky and daylight: ICE 1.25” Variable Polarizing Eyepiece Moon Filter
5. Best for enriching your collection and observing various planets smoother: Celestron 94119-10 1.25” Eyepiece Filter Set
6. Best for observing the sun: Celestron 94244 Telescope Filter
7. Best for observing the lunar surface without altering the color: Newer Neutral 1.25 inches Neutral Density Moon Filter
8. Best for eliminating the unnatural color surrounding bright stars: Celestron 93623 Narrowband Oxygen III 1.25 Filter
9. Best for protecting your eye: Astromania 1.25” IR/UV Blocking Filter
10. Best for observing the deep sky: Solomark 1.25 Inch Telescope Moon and Skyglow Filter
11. Best for observing the Sun: Astromania Deluxe Solar Filter
12. Best for observing various planets: Newer 1.25 inches Telescope filter set
13. Best for removing light pollution: Gosky 1.25-inch Light Pollution filter

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In spite of having a large aperture’s telescope you are facing trouble to see clear images of distant stars, clusters, nebulae and galaxies?

You are seeing poor quality, blurry and dim images of distant celestial objects and facing light pollution. Don’t worry. This bunch of problems can be easily solved by telescope filters. Apart from that, when you thinks about travel with your telescope, we think a great telescope filters can make your goal fulfilled.

At one time almost all emerging astronomers feel that they need to buy a filter to improve their observing or astrophotography results. You will find some best telescope filters from the market which will improve.

Why Should You Use a Telescope Filter?

We know, for observing long distance objects, we need a large aperture’s telescope. The work of aperture is gathering light for your telescope that works to make your observation smooth and enjoyable and makes a clear image. But your observation can be interrupted for light pollution.

Who doesn’t like fruit juice? No one wants fruit fiber in his favorite flavor’s juice glass. That’s why we try our best to filter well. Telescope filters work some kind of that for telescopes. Basically, it removes the light which makes your celestial object looking worse. The filter will improve your celestial object’s contrast and will make it ‘ping’ out of the eyepiece. In a word, your backyard astronomy experience will be improved surpassingly.

The size of telescope filters is the same as the eyepiece of your telescope and stick to it.

Three General Classes of Telescope’s Filters: They will Make Your Astronomy Experience Amazing in Different ways

There are three types of Telescope filter which make observing of deep sky smooth. E.g.

• Light Pollution Filters
• Narrowband Filters
• Line Emission Filters

Light Pollution Filter

Light Pollution Filters are basically first level filters. Because They allow access to more light than other filters. It means most of the light entering the telescope reaches our eyes. Now a question arises then what light do they filter?

Actually Light pollution filters remove light wavelengths which originated from street light pollution. But there is a problem here, they work well against sodium and mercury vapor but not for LED streetlights. For instance, light pollution filters are not fruitful against them.

Narrowband Filters

The beauty of nebulae will give you celestial feelings. If you want to feel this, you have to ensure your telescope is giving the access lights which come from only nebulae. For this situation, Narrowband filters are more constructive. Since these filters are more discerning so they are more expensive.

Line Emission Filters

At last, we are going to introduce the most expensive telescope filters named Line Emission Filters with you. They are also called The Line Nebula Filters. These filters allow access to only a single wavelength of light to pass through.

Most Typical Filters are for oxygen 3, hydrogen alpha and hydrogen beta (OIII, H-Alpha and H-Beta)

OIII filter

They give access to two particular wavelengths of light passing through the telescope which originate from oxygen 3. Whatever, let’s explain it in an astronomical way. These wavelengths are nebulae with green, turquoise and cyan colors.

H-Beta Filter

These filters give access to a blue single wavelength which originates from a hydrogen ion.

H-Alpha Filter

These filters are designed to allow a narrow bandwidth of light usually created on the H-alpha wavelength.

How Do You Pick What’s Best for Your Need?

We know, large apertures gather more lights for observing. But sometimes we face trouble viewing the object for light pollution. So we need to use a telescope filter. If your telescope’s aperture is comparatively less, then maybe it won’t make much of a difference. However, remember another thing, pick the one that will suit your size telescope.

Types of Telescope Filters

There are four main filter types which will radically change your observation. They are solar, lunar, planetary, deep sky.

Solar Filter

A question arises in our minds; can we observe the sun with a telescope? The answer is yes we can. But we need a solar filter.

There are two types of solar filter. They are eyepiece and full aperture.

Eyepieces are cheaper than full aperture. You may give entry by cheaper one which filters screw onto the bottom of eyepieces. But sometimes it will be risky for you. Because when your telescope will focus all light of the sun then shatter may crack or glass from this heat, passing through a blinding dose of light.

Typically, Full aperture solar filters are made of a special flexible film or glass. This filter stays at the end of the telescope’s tube. For this design, in the first place the quantity of light and ultraviolet radiation and heat that enters scope is reduced dramatically. Though Solar observing is about as dangerous as stargazing gets, Full Aperture solar filters are a far safer alternative.

Lunar Filters

These filters will make your observation smooth of extra bright objects. Basically it works like a sun glass which decreases light across all visible wavelengths.

Typically, they are two types. E.g. Neutral density filter, combination of two polarizing filters.

You will find these filters in various transmissions. It means they darken compared to the lunar surface more or less.

Another type is a combination of two polarizing filters which give you access to vary the quantity of light and light can be adjusted manually by one of the polarisers.

Colour Filters

Planetary Filters: These filters give access only to a single colour and improve contrast. Maybe, for Novice planetary observers, the observation will be a little bit odd. For instance, we will suggest that you ignore the colour wash and focus on the detail visible!

Deep Sky Filters: Deep sky filters are also called Light Pollution Filter. While we observe the faint object of the deep sky, we face trouble observing for background glow of street lighting. This obstacle for observing has been removed by deep sky filters.They specially eliminate the reflection of light as much as possible. For making your observation amazing, you will really want to lose as little light as possible. For this purpose, these are perfect. But they are most expensive and complex too.

How To Use Telescope’s Filters

Telescope filters are very important tools for our telescope. In spite of having a large aperture’s telescope we face some problems observing the faint celestial of the deep sky. But for telescope filters, we have been able to overcome these obstacles for smooth viewing.For getting the best result from our telescope filters, we have to keep in mind some terms and guidelines. E.g. Lower power for beginning, using in dark location, eyes adjustment.

Lower power for beginning: It is better using lower power telescope filter to begin

using in dark location: Usually we use telescope filters to remove light pollution. But when we will use it in a dark location, it will have a dramatic impact on your viewing.

eyes adjustment: When you use your filter, then make sure that your eyes are dark adjusted and your observing will be smoother.

Our Top 15 Best Telescope Filters Reviews

01. Thousand Oaks Optical 4″x4″ Solar Filter Sheet for Telescopes

Thousand Oaks optical 4”x4”, basically solar filter shit for cameras, Binoculars and Telescopes. So, buying only one product, you can make a filter for your camera/binoculars/telescope and you can reduce the cost compared to factory made filters. By using this, you will see the sun in a natural orange color. Most typical filtering material for viewing granulation and sunspot is Silver-Black polymer.

At a glance

• Versatile usable.
• Your money savior.
• A perfect observing companion.

Note: At last we are going to share a bad side of this product with you. Since, this is not exactly a filter, it is a filter shit. That’s you have to make the filter yourself. If you are not familiar with this, it can be ruined.

Authenticity

• Thousand Oaks Optical, Arizona has been providing safe solar filters over 30 years.
• Guarantee 5 years.

Warning

• While observing, be careful about falling.
• Use sticky tape to well attach to your binocular or the telescope. 

Specifications

• Product Dimensions: 4.02 x 4.02 x 0.12
• Item Weight: 0.64 ounces
• Manufacturer: Thousand Oaks Optical

02. Celestron 94105 Neutral Density Moon Filter

This filter is a Neutral density moon filter. Light transmission rate 13%. Celestron 94105 Neutral Density Moon Filter 1.25 is designed for 1.25” eyepieces. It reduces unwanted brightness and increases clarity of the moon, bright double stars and Venus. It gives access to only 13% light of wavelengths and provides a true color image.

This filter is perfect for observing the moon and bright objects, true color producer.But Remember one thing, adjusting only to 1.25” eyepiece is one kind of limitation.

At a glance

• It is a moon filter.
• True color producer.
• Light transmission rate 13%.

Specifications

• Material: Glass
• Photo Filter Effect Type: Neutral Density
• Water Resistance Level: Not Water Resistant
• Manufacturer: Celestron

03. 1.25” Orion 13% Transmission Moon Filter

You can easily observe the rugged surface of the moon with its mountain highlands, fascinating craters and large dark lunar seas formed by ancient volcanic activity without altering their color. 

Observing the divine view of the moon is one of the most interesting objects for amateur astronomers. We know, the moon is reflected by the sunlight. That’s why we can see the most attractive beauty of the sky. But sometimes for reflected bright sunlight our observing can be challenging due to the overwhelming glare. In this situation, we can overcome this obstacle by increasing contrast and tone.

To improve your viewing, we will recommend you 1.25” Orion 13% Transmission Moon Filter. This filter allows 13% of the light gathered by the telescope which improves the contrast and will give you a magnificent view.

At a glance

• It allows 13% light of the wavelengths.
• This accessory threads directly into a 1.25-inch eyepiece.
• Observing the moon without altering the color.
• A perfect filter to observe the moon.

A Decent Recommendation

If you use a big telescope especially with 6 inches’ aperture or more, this filter will give you a dramatic effect. This filter helps to conserve dark-adapted vision.

Specifications

• Brand: Orion
• Manufacture: Optronic Technologies, Inc.
• Material: Plastic
• Photo Filter Thread Size: 31.75 mm
• Photo Filter Effect Type: Neutral Density

04. ICE 1.25” Variable Polarizing Eyepiece Moon Filter

Are you looking for a filter which gives a great experience in night sky and daylight also?If it is you, we think, ICE 1.25” Variable Polarizing Eyepiece color neutral Moon Filter is perfect for you.

Actually It is a moon filter for telescope polarizers. The most helpful feature of this filter is, it will give you various light reduction rates from 1% to 40%. You can easily reduce or increase its transmission rate by rotating. For this reason, this filter also works in daylight. They cut reflection of the windows and reduce glare.

At a glance

• Various reduction rates from 1% to 40%.
• Deduces the brightness of planets and moon and color neutral.
• Filter threads easily on any telescope with a 1.25” eyepiece.

Note: This filter’s light reduction rate is 1% to 40%. It means the filter allows a minimum 60% of light which gathers your telescope. If your intention is only observing the Elysian view of deep night sky not observing in the daylight, 13% transmission rate’s telescope filter will be better for you of which reduction rate is 87%.

Specifications

• Product Dimensions: 1.5x 1.5 x 1.5 inches
• Item weight: .64 ounces
• Manufacturer: Desmond

05. Celestron 94119-10 1.25” Eyepiece Filter Set

Buying this product, you will get four types of high quality and solid plane parallel glass’s neutral density telescope filter in one. E.g. #12 Deep Yellow, #21 Orange, #80A Blue and #ND-96-0.3

#12 Deep Yellow

 This filter is perfect to improve the contrast of the features of the moon for less than 4.5” aperture’s telescope. And you can view clouds and polar ice caps on Mars, the equatorial belts on Saturn and Jupiter and the dusky detail on Neptune and Uranus.

#21 Orange

 It decreases the reduction of green/blue transmission and makes sharp boundaries along the plains of Mars. It is also beneficial to observe the belts and polar regions of Saturn and Jupiter in detail.

#80 A Blue

By using this you can easily improve the contrast for observing the polar ice caps on Saturn and the cloud belts on Jupiter. If you don’t have any headache with color shift, you can also use it to see the moon.

#ND-96-0.3 

This filter decreases the brightness without changing the color. It is a great filter for the moon and double stars.

 At a glance

• You can use this for multi purposes.
• Giving smooth experience for observing planets and the moon without changing the color.
• 50% transmission rate.
• High-quality, solid plane parallel glass and stackable filter for various combinations.

Note: This is plastic build, so you might feel cheap. But we hope the performance of these will make you satisfied.

Specifications

• Brand: Celestron
• Material: Glass
• Photo Filter Effect Type: Neutral Density

06. Celestron 94244 Telescope Filter

We are familiar with some harmful radiation from the solar system. They are IR and UV light. When we will observe the sun, Celestron 94244 Telescope Filter, 8”, Black is ISO compliant solar film, that protects our eyes, unlike some other filters on the market. 

SAI Global Assurance Service has tested Celestron Solar safe filter technology. It has been proved that it is safe.

Notes:

• Transformation requirements of ISO 12312-2.
• EN 1836:2005 + A1:2007 (E) for an E15 Filter for the Direct Observation of the Sun
• t has AS/NZS 1338.1:2012, Filters for Eye Protectors.

Specifications

• Brand: Celestron
• Material: Paper
• Photo Filter Thread Size: 8mm
• Photo Filter Effect Type: Ultraviolet

07. Newer Neutral 1.25 inches Neutral Density Moon Filter

You can easily observe the rugged surface of the moon with its mountain highlands, fascinating craters and large dark lunar seas formed by ancient volcanic activity without altering their color.

From ancient times, the beauty of the moon is in the center of human interest. Newer brand is providing you a premium quality neutral density moon filter. Plastic thread and optical glass and aluminum frame will give you a premium feeling. The 13% transmission rate of the light will improve the contrast and reduce the irradiation which combination will show you a magnificent view without removing color. For this reason, you can study them in greater comfort.

At a glance

• It allows 13% light of the wavelengths.
• This accessory threads directly into a 1.25-inch eyepiece.
• Observing the moon without altering the color.
• Helps conserve dark-adapted vision while viewing the lunar surface.
• Fits all standard 1.25 eyepieces.
• A perfect filter to observe the moon.

A Decent Recommendation

Use 6 inches’ aperture or more and observe a dramatic effect.

Specifications

• Product Dimension: 4.6x 4.5 x 0.7 inches
• Item Weight: 1.8 ounces
• Manufacturer: Newer

08. Celestron 93623 Narrowband Oxygen III 1.25 Filter

Celestron 93623 Narrowband Oxygen III 1.25 Filter helps to block all of the visual spectrum which eliminates the un-natural colored halos surrounding bright stars.

These filters give access to two particular wavelengths (496 and 501nm lines) of light passing through the telescope which originate from oxygen 3.

 If you want to view the Veil, Dumbbell, ring, Orion nebula, Crescent, other objects in detail, you need extreme contrast between the faint photons of OIII light and the black sky background.

At a glance

• Narrow Band OIII Filter.
• Makes high contrast.
• Your observing will be smoother.

Note:  Though it is made with high quality material and very useful for observing, maybe you might feel that the filter’s lens is slightly loose. But don’t worry, this didn’t seem to affect the image.

Specifications

• Package Dimensions: 3.0L x 1.0H x 3.0W (inches)
• Package weight: 1.0 pounds.
• Manufacturer: Celestron.

09. Astromania 1.25” IR/UV Blocking Filter

While we observe planetary images, the harmful UV and IR radiation has a bad effect on our eyes. Astromania 1.25” has sorted this problem. 

By blocking IR/UV, you will get real sharp planetary images. These astromania filters give access to the visible light spectrum. (400-780nm). We know, planets not only shine in visible light, but also in the infrared. But in the IR region, they are out of focus. This filter gives access to the visible light which we really want and provides a sharp image. So it is extremely useful when observing using an objective solar filter. (e.g. a foil filter)

At a glance

• Allows only visible light.
• Blocks the IR and UV radiation.
• Coated and polished optically.
• Especially useful for planetary imaging with webcams.
• Continued in a robust 1.25 aluminum housing.

Specifications

• Product Dimensions: 2.79x 2.74x 0.56 inches
• Item Weight: 0.2 ounces
• Material: Optical Glass
• Photo Filter Effect Type: Ultraviolet
• Manufacturer: Astromania

10. Solomark 1.25 Inch Telescope Moon and Skyglow Filter

It increases the contrast of the celestial objects against the background sky.

Solomark 1.25-inch telescope filter is a multi-bandpass filter transmitting a high percentage of light in the visual spectrum. It is specially designed for filtering sodium vapor, mercury vapor, man-made emission lines or natural sources which make it difficult to observe the moon.

You can easily see the faint object of the deep space because the filter has a mild effect of darkening the background of the night sky. Basically it is not a nebula filter but it increases the contrast which makes the deep sky observing smoother.

At a glance

• Improves visibility in the deep sky and allows a high percentage of light in the visual spectrum.
• Observing the moon makes smoother,
• Increases the contrast of the celestial objects against the background sky.
• Fits all standard sized 1.25” eyepieces.

Note: Don’t expect too much. The quality which you will get, you may not be satisfied with that but when you will come to the price we hope you will be satisfied.

Specifications

• Product Dimensions: 9.06x 7.09x .98 inches
• Item Weight: 2.11 ounces
• Manufacturer: SOLOMARK

11. Astromania Deluxe Solar Filter

You will get superior contrast and exceptional resolution compared to Mylar and other solar filter materials. It displays a neutral and natural white view of the sum. Since this a neutral color balanced filter so it can be used in tandem with various color eyepiece filters.

The sun is the nearest star from us. It should be the reason behind observing the sun even more closely. Now we are going to introduce you to the Astromania Deluxe Solar Filter which has 80mm adjustable Metal cap for telescope tubes with Outer Diameter from 50mm to 72 mm Aperture 55mm.

This filter blocks 99.9% of incoming sunlight. For this you can easily observe the sun without damaging your eye.

It has high quality polymer film material which allows .0001% incoming sunlight. It provides a crisp and clear view by rejecting harmful infrared and ultraviolet radiation.

At a glance 

• Sunlight blocking light rate 99.9%.
• It can be easily fit with an outer diameter of 50mm to 72mm.
• High quality polymer film material.
• A neutral and Natural white view.

Authenticity

The solar filter meets ISO 12312-2:2015 and Amazon has verified the security.

Warning:

• Never use this filter if it is any disrepair. Otherwise the result will be permanent eye damage.
• If you use the larger diameter, some solar filters may have wavy lines on the film which will not have any effect for observation.

Specifications

• Product Dimensions: 4.8x 1.18x 4.37-inch
• Item Weight: 4.2 pounds
• Manufacturer: Astromania.

12. Newer 1.25 inches Telescope filter set

This product is a set of filters. It provides 7 filters. One is Moon and skyglow filter, another one is CPL filter and other five filters are color filters. E.g. Red, Orange, Yellow, Green, Blue.

Moon and skyglow filters deliver more clear and natural images by removing street light smog. 

CPL Filter for removing reflections and see detail behind it.

Orange filters help to see great red spots on Jupiter and dust storms on Mar by increasing contrast between light and dark areas.

Yellow filter helps to view red and orange features on Saturn and Jupiter, by bringing out the polar ice caps seeing Mars and darkens the blue festoons near Jupiter’s equator.

Red filter assists to see Jupiter and Mars surface in detail by sharpening belt contrast on Jupiter and increasing contrast on Mars.

Green filters increase surface fog, frost patches and polar projections on Mars, belts on Jupiter, the system ring on Saturn. Whatever there is another advantage of this filter. You can use it viewing the Moon as a general-purpose filter.

When at maximum separation, the Blue filter helps split the binary star Antares and provides detail in belts and polar features on Saturn, atmospheric clouds on Mars.

It increases contrast on the moon.

At a glance

• 7 pieces’ filter set.
• 1-piece moon filter and 1-piece CPL filter.
• 3. 5 colors filter.

Note: Red filter works better for large telescopes.

Specifications

• Product Dimensions: 6.42x 4.25x 2.76 inches
• Item Weight: 4.4 ounces
• Manufacturer: Newer.

13. Gosky 1.25-inch Light Pollution filter

Light Pollution filters are used for improving visible quality for celestial objects in the deep sky.

Actually these filters block man made emission lines, sodium vapor, mercury vapor or natural sources which are responsible for light pollution. Light pollution filter allows wavelengths of visual spectrum and it increases the contrast of faint objects of deep sky against the background which provides sharp images.

At a glance

• Light pollution filter.
• Increases contrast of the object against the background.
• Standard 1.25” eyepieces.
• It has a sturdy plastic case which protects eyepiece from dust and moisture

Note: Considering the price, it is a better one. So don’t expect a lot.

Specifications

• Package Dimension: 3.7×2.76x.94 inches
• Item weight: 0.81 ounces
• Manufacturer: Gosky.

Telescope Filter Buying guide

Telescope filters are very important tools for the telescope. Basically a filter reduces the amount of light which comes through the telescope. To see the faint object, we need a high aperture’s telescope. Because high aperture provides us more light to observe the faint object properly but sometimes by reducing the light we can observe the deep sky object in detail.

Most of the time filters are attached to eyepieces but sometimes they are also attached in front of the telescope.

Early we mentioned that we use a large aperture’s telescope to see faint objects in the deep sky. Large aperture gathers more light. Since filters remove the light, if your telescope aperture is large, filters will be useful. But in smaller aperture cases, filters may remove so much light. So you will not get any benefit.

We realize that now a question has arisen in your mind. It may be, what are large and small apertures suitable for using filters?

Actually there are no clear guidelines. If you have a 80mm aperture’s telescope or more, you can experiment with filters. If you have more than 150mm of aperture, you must use filters.

Factors affecting viewing quality

The factors for viewing quality are filter thickness, the wavelength of light and the index of refraction of the glass used in the filter that affect focus with a filter inside the optical system.

Radiation Objects Vs Reflecting Objects

In our solar system, there are two types of objects. One type is reflecting objects and the other type is a Radiation object.

The moon, Mars, Saturn, Venus etc. reflect the light from the sun. We see the moon as shades of white, gray and black based on the reflections from various materials on the lunar surface. We also see march is reddish and Venus is bright white.

When we look at Saturn and Jupiter, we see cloud bands because light is reflected in the atmospheric gases. Some color bands absorb certain colors and reflect. For this reason, we see the cloud band as the shade of gray. 

By using telescope filters, we can observe those celestial objects more smoothly. This will provide us with a clear and sharp image.

The source of the light of radiation objects is themselves. There are so many radiation objects such as the Sun, stars, star cluster, globular cluster, nebula, galaxies etc.

These objects transmit the light as the same as the sun or less. You can take some advantage of observing them by using filters. filters remove some light to increase details.

Some filters give access only to a limited part of light and some allow all wavelengths. So we should keep all of this in our mind.

Light Pollution Filter

This filter works to remove the light pollution which occurs from street lights, industrial lights or parking lot lights. In the past, these lights were made by mercury vapor and sodium vapor lights. They create light pollution.

LP filters remove the light pollution and increase contrast of the object. But at present city lights are being replaced by LED lights. So Light pollution filters are not effective now.

Full Spectrum Light Limiting filter

These filters are neutral density filters. it means, they pass all wavelengths of light and just reduce the level. Actually they work like wearing sunglasses. Full Spectrum Light filters are typically solar and lunar filters.

Solar filter helps to observe the sun smoothly. They are called full aperture filter. because they cover the front of the telescope and dramatically reduce the light.

There are two types of solar filter. one is made of glass and the other is made of plastic film. If it is made of plastic film, it looks wavy and normal but it doesn’t affect its performance.

Solar filters block 99.9 % of lights. Whatever be careful, the small scratches of the filter can pass too much UV radiation which will be responsible for your eye damage. And never use a solar filter that attaches to the eyepiece.

Watching sun spots, eclipses and planetary transits will be a more amazing and interesting journey for Amateur astronomers.

Lunar filters are for observing the moon. You can easily observe the bright moon by it. They are usually attached to the bottom of the eyepiece or some cases, the front of the diagonal. Most of the people feel uncomfortable to see the moon with a large aperture’s telescope. So you need a moon filter.

There are various kinds of transmission rate of the moon filter. E.g. 13%, 25%, 75%,40%. Most common types are 13% and 25%.

For 80mm to 300 mm aperture or 150% or less, 25% is better. If you have a telescope whose aperture is greater than 150, a 13% transmission rate’s lunar filter would be suggested.

Color Filters (Planet Filter)

planet filters are used for observing the planets. There are various kinds of color filters. Some descriptions are given below,

12 Deep Yellow:

 This filter is perfect to improve the contrast of the features of the moon for less than 4.5” aperture’s telescope. And you can view clouds and polar ice caps on Mars, the equatorial belts on Saturn and Jupiter and the dusky detail on Neptune and Uranus.

#21 Orange:

 It decreases the reduction of green/blue transmission and makes sharp boundaries along the plains of Mars. It is also beneficial to observe the belts and polar regions of Saturn and Jupiter in detail.

#80 A Blue: 

By using this you can easily improve the contrast for observing the polar ice caps on Saturn and the cloud belts on Jupiter. If you don’t have any headache with color shift, you can also use it to see the moon.

#ND-96-0.3 

This filter decreases the brightness without changing the color. It is a great filter for the moon and double stars.

#56 light Green

Can highlight areas in Jupiter’s cloud belts and Mars’ ice caps.

Deep Sky Object Filter-Nebula Filter

Deep Sky object filters are also called nebula filters. Deep sky objects are not reflective. They produce light themselves. some are made up of stars or glowing gas clouds.

Actually this filter allows some specific wavelengths of light. They work extremely for some nebulae. Generally, they are three types. E.g. oxygen 3, H-Beta, H-Alpha.

OIII Filter

They give access to two particular wavelengths of light passing through the telescope which originate from oxygen 3. Whatever, let’s explain it in an astronomical way. These wavelengths are nebulae with green, turquoise and cyan colors.

H-Beta Filter

These filters give access to a blue single wavelength which originates from a hydrogen ion.

H-Alpha Filter

These filters are designed to allow a narrow bandwidth of light usually created on the H-alpha wavelength.

Final Thoughts

Filters reduce the light through your telescope. In the case of solar filters, they block the radiation and reduce the light. Before buying a filter, first you have to fix what you are going to do. So the best way is knowing the filters in detail and the way they work.