Telescope Filters Guide

 

telescope filters
Orian Nebula Without Ultra High Contrast/Light Pollution Reduction Filter
telescope filters
Orian Nebula With Ultra High Contrast/Light Pollution Reduction Filter

If you love the Universe as we do, and already own a telescope, perhaps with the time you have lost some of your enthusiasm. Most likely that’s because you’ve seen all what you have ever dreamed of. If you still didn’t try various filters, then we have good news for you. You can forget everything you have seen until now and rediscover the night sky again. And now – from very new perspective. This time with much more colors, sharpness and contrast. Whether this will be the polar caps of Mars, or some distant nebula, looking through telescopic filters will definitely enhance your midnight experience.

Like photographic filters, these for telescope increase detail and improve contrast. They do it by removing unwanted color of the wavelength of light. let’s have a look to the most popular ones:


 Light Pollution Filters

The most common “junk” light is the one comes from the city lights. If you are an amateur astronomer and live in a city you probably know what I mean. Unfortunately, light pollution can kill your enthusiasm even if you’re miles away from the downtown.

Fortunately, there are filters that magically will clear the image from light pollution do not cost a fortune, and they gonna make you love your telescope much more!

Order now, and while you are waiting the little thing to get delivered, start getting out the Telescope from the closet. We did research and here are the top five filters removing light pollution on the market  today:

SaleBestseller No. 1
Gskyer Telescope, 70mm Aperture 400mm AZ Mount Astronomical Refracting...
19,201 Reviews
Gskyer Telescope, 70mm Aperture 400mm AZ Mount Astronomical Refracting...
  • Quality Optics: 400mm(f/5.7) focal length and 70mm aperture, fully coated optics glass lens with high transmission coatings creates stunning images and protect your eyes. Perfect telescope for astronomers to explore stars and moon.
  • Magnification: Come with two replaceable eyepieces and one 3x Barlow lens.3x Barlow lens trebles the magnifying power of each eyepiece. 5x24 finder scope with mounting bracket and cross-hair lines inside make locating objects easily.
  • Wireless Remote: Free includes one smart phone adapter and one Wireless camera remote to explore the nature of the world easily through the screen and take amazing celestial images.
  • Adjustable Tripod: This telescope allows for many different viewing positions with a adjustable aluminum alloy tripod and a carry bag, the telescope and tripod can fit inside the bag for easy traveling and storage.
  • Satisfaction: TWO-YEAR warranty. And technical support from our team of experts in 24 hours.
Bestseller No. 2
SOLOMARK Telescope, 80EQ Refractor Professional Telescope -700mm Focal...
301 Reviews
SOLOMARK Telescope, 80EQ Refractor Professional Telescope -700mm Focal...
  • BeginnersTelescope: The SOLOMARK 80EQ telescope is an easy-to-use and powerful telescope. The telescope to give the first-time telescope user the good combination of quality, value, features, and power.It's good choice for telescopes for astronomy beginners.
  • Manual German Equatorial Mount: Telescopes for adults navigate the sky with our refractor telescope. It features a German Equatorial mount with a slow-motion altitude rod for smooth and accurate pointing. Adjust rod to desired position, then easily secure by tightening cross knob. This study mount features large slow-motion control knobs so you can track objects smoothly and seamlessly as they drift across the nighttime sky.
  • Compact and Portable: This telescope for adults and kids to be used together is compact, lightweight, and portable. Take the telescope to your favorite campsite or dark sky observing site, or simply the backyard.
  • Objects to Observe:Telescopes for adults with high quality, all-glass optics deliver crisp views of the moon, the rings around Saturn, and Jupiter’s Galilean moons. Or explore Nebula, Andromeda Galaxy, and more.
  • Multiple Accessories: Professional telescope features 2 eyepieces (10mm and 20mm), erect image diagonal, finderscope, 13% moon filter, a smartphone adapter, and plus a Barlow lens to triple the power of each.
Bestseller No. 3
IR850-Supernova Long Range IR Illuminator with Adjustable Mount
69 Reviews
IR850-Supernova Long Range IR Illuminator with Adjustable Mount
  • Extremely powerfull and long range - dramatically increases visibility in poor light conditions or total darkness
  • The contents of the kit include the IR illuminator itself, a mount, a battery and a battery charger. The product is ready for use
  • Adjustable mount for weaver rails - quick to attach and easy to release. Allows to swap the scopes in no time, can be used as a handheld unit
  • Brightness control ring provides quick access to 4 stage output: 5%, 30%, 70% and 100%
  • The item is constructed of top quality aircraft grade aluminium with hard anodized surface. Recoil resistant and waterproof to IPX8 standard
Bestseller No. 4
Optolong 2' L-Pro Light Pollution Filter
16 Reviews
Optolong 2" L-Pro Light Pollution Filter
  • Dramatically Reduces Light Pollution Impact
  • Rejects Mercury and Sodium Light While Increasing Contract
  • Excellent for Reflection Nebulae and Galaxies
  • Use with Monochrome or One-Shot Color Cameras
SaleBestseller No. 5
Gosky 1.25 Inch Light Pollution Filter for Telescope
340 Reviews
Gosky 1.25 Inch Light Pollution Filter for Telescope
  • Improve the visibility of deep sky objects by blocking out the mercury vapor, sodium vapor, and other such emission lines from man-made or natural sources which contribute to light pollution
  • Improves contrast on reddish planetary detail. Works well in telescopes of all apertures
  • The filter will fit all standard sized 1.25" eyepieces and accessories. Can be threaded on both sides for stacking with other filters if necessary
  • Comes with sturdy plastic case-proect the eyepiece from dust and moisture
  • Mounted in a nicely anodized housing.

 Moon Filters

Moon – the closest object to Earth, and why not the most frequently observed is also looking far more beautiful if you see it in details with Polarizing Filters for Observing the Moon. Did’t try yet? Well, believe me, you’ll be surprised how much you missed. Due to the brightness, your pupil shrinks, the less light reaches your eyes. And you know best – less light, less detail!

Information about what makes this type filters can be found in the video below:

Here are top 5 Moon Filters Selling by Amazon

Bestseller No. 1
Celestron 94105 Neutral Density Moon Filter 1.25', Black
1,721 Reviews
Celestron 94105 Neutral Density Moon Filter 1.25", Black
  • Reduces brightness and cuts glare, increasing clarity of the moon, Venus, and bright double stars
  • 13% light transmission
  • Provides a true Color image
  • Threads on to any Celestron 1.25” eyepiece
Bestseller No. 2
Neewer 1.25 inches Telescope Moon Filter, CPL Filter, 5 Color Filters...
774 Reviews
Neewer 1.25 inches Telescope Moon Filter, CPL Filter, 5 Color Filters...
  • PLEASE NOTE: The telescope is not included. Kit includes: (1)Moon and Skyglow Filter; (1)CPL Filter; (5)Color Filters: Red, Orange, Yellow, Green, Blue; Designed to reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue
  • MOON AND SKYGLOW FILTER: Cuts down glare and brings out much more surface detail and gives you better contrast; It is a multi-band pass filter transmitting a high percentage of light in the visual spectrum; Effectively filters out selective wavelengths of low-pressure sodium and other man-made sources typically used in street lighting
  • CPL FILTER: By utilizing a CPL filter, which filters out scattered light, you are able to cut through those reflections and see the detail behind it; Enhances the contrast of the moon and planets in photographic images
  • STANDARD 1,25-inch THREAD SIZE: 1.25 inches/ 3.17 centimeters thread size, fits for most of telescopes; Color filters have the grooves needed to be softly screwed into the eyepieces lens easily
  • 5 COLOR FILTERS: Includes Red, Orange, Yellow, Green, Blue; Red: Helps make Mercury and Venus stand out from the blue sky when viewed during the day; Orange: Helps increase contrast between light and dark areas, penetrates clouds; Yellow: Helps greatly in viewing Mars by bringing out the polar ice caps; Green: Enhances frost patches, surface fogs, and polar projections on Mars; Blue: Helps split the binary star Antares when at maximum separation
Bestseller No. 3
Orion 05662 1.25-Inch 13 Percent Transmission Moon Filter (Black), Single
937 Reviews
Orion 05662 1.25-Inch 13 Percent Transmission Moon Filter (Black), Single
  • The Orion 1.25 inch 13 percent Transmission Moon Filter reduces glare so you can see more lunar detail and surface features with your telescope
  • Metal filter cell threads directly into the 1.25 inch barrel of your telescope eyepiece
  • Especially useful for large aperture telescopes through which the light of the Moon can be extremely overwhelming
  • Telescope eyepiece filter transmits only 13 percent of the incoming light, boosting contrast and ability to discern detail on the Moon
  • Perfectly neutral color will not alter the natural color of the Moon
Bestseller No. 4
SVBONY SV139 Telescope Filter Moon Filter 1.25 inch 12.5 Percent...
34 Reviews
SVBONY SV139 Telescope Filter Moon Filter 1.25 inch 12.5 Percent...
  • Neutral Density ND Filter; Giving great versatility in changing light. Reduces the amount of light without effecting color balance; Perfectly neutral color will not alter the natural color of the Moon
  • High-quality optical lenses;Made by completed professional optical glasses; Multi-layer coating;ND8 filter transmits only 12.5% of the incoming light;It has outstanding image sharpness and perfect colour neutrality
  • 1.25'' barrel diameter;Metal filter cell threads directly into the 1.25 inch barrel of your telescope eyepiece;Useful for different caliber astronomical telescopes through which the light of the Moon can be extremely overwhelming
  • Great Filter Frames;Filter Frames made by aluminum alloy; the serrated design of the edge of the frame makes it easy to install;Increase surface durability
  • Extend shooting time;such as wanting to shoot misty flowing water in very bright places; Exposure time can be greatly extended to blur pedestrians or even completely
Bestseller No. 5
Neewer 1.25 inches 13 Percent Transmission Neutral Density Moon Filter,...
170 Reviews
Neewer 1.25 inches 13 Percent Transmission Neutral Density Moon Filter,...
  • Premium Material: Aluminum frame, plastic thread and optical glass, durable and no damage to your lens
  • Transmits only 13 percent of the incoming light, boosting contrast and ability to discern detail on the Moon
  • Helps reducing overall brightness without altering color, so that not only will more surface features and details pop out, but also you can study them in greater comfort
  • Helps conserve dark-adapted vision while viewing the lunar surface
  • Helps reduce irradiation, which is the distortion at the boundary between light and dark areas, such as along the lunar terminator

 Planetary Filters

An important role plays the filters for observations Planets and objects in Deep Space. You might argue about filtering of light – you gave a lot of money for large aperture exactly to gather more light. But in Astronomy not every light is helpful.

telescope filters

Certain wavelengths of light coming from, for example, a nebula, do not contribute to detail. If you remove them, the image that remains is much sharper and have better contrast.

Telescope filters do just that: eliminate light that does not add any detail to the object. What remains is a much cleaner image, that lets you see the finer details with better contrast.


Different objects require different types of filter to see them best.  Jupiter’s Great Red Spot needs a different filter than this for polar regions of Mars or Venus’s clouds. In the chart below you can find the appropriate filters for the various objects and the top 5 Planetary Filter Sets on the market today.

 
 
Bestseller No. 1
Neewer 1.25 inches Telescope Moon Filter, CPL Filter, 5 Color Filters...
774 Reviews
Neewer 1.25 inches Telescope Moon Filter, CPL Filter, 5 Color Filters...
  • PLEASE NOTE: The telescope is not included. Kit includes: (1)Moon and Skyglow Filter; (1)CPL Filter; (5)Color Filters: Red, Orange, Yellow, Green, Blue; Designed to reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue
  • MOON AND SKYGLOW FILTER: Cuts down glare and brings out much more surface detail and gives you better contrast; It is a multi-band pass filter transmitting a high percentage of light in the visual spectrum; Effectively filters out selective wavelengths of low-pressure sodium and other man-made sources typically used in street lighting
  • CPL FILTER: By utilizing a CPL filter, which filters out scattered light, you are able to cut through those reflections and see the detail behind it; Enhances the contrast of the moon and planets in photographic images
  • STANDARD 1,25-inch THREAD SIZE: 1.25 inches/ 3.17 centimeters thread size, fits for most of telescopes; Color filters have the grooves needed to be softly screwed into the eyepieces lens easily
  • 5 COLOR FILTERS: Includes Red, Orange, Yellow, Green, Blue; Red: Helps make Mercury and Venus stand out from the blue sky when viewed during the day; Orange: Helps increase contrast between light and dark areas, penetrates clouds; Yellow: Helps greatly in viewing Mars by bringing out the polar ice caps; Green: Enhances frost patches, surface fogs, and polar projections on Mars; Blue: Helps split the binary star Antares when at maximum separation
Bestseller No. 2
Orion 05514 Basic Set of 1.25-Inch Four Color Filters (Black)
63 Reviews
Orion 05514 Basic Set of 1.25-Inch Four Color Filters (Black)
  • Handy color planetary telescope eyepiece filters help enhance your view of the planets and Moon, unveiling specific features and enabling you to discern more detail
  • High-grade Schott optical glass is vat-dyed for even color coating, then anti-reflection coated for maximum light throughput
  • Anodized aluminum cells are double-threaded to permit filter stacking for multiple filter use
  • Includes 15 Deep Yellow, 25 Red, 58 Green and 80A Medium Blue
  • Each filter has a metal filter cell and is threaded for use with Orion 1.25 inch telescope eyepieces and filter-threaded accessories
Bestseller No. 3
Orion 5453 Premium 1.25 Inch 20-Piece Color Planetary Filter Set (Multiple...
21 Reviews
Orion 5453 Premium 1.25 Inch 20-Piece Color Planetary Filter Set (Multiple...
  • Premium assortment includes 20 of the best 1.25 inch color filters for planetary viewing
  • Color filters make it easier to see planetary and lunar details
  • Improve contrast of specific planetary and lunar features
  • Includes sturdy metal case with die-cut foam interior for safe storage and transport
  • Quick-reference guide indicates benefits of each filter at-a-glance
Bestseller No. 4
Zhumell 1.25' Lunar and Planetary Color Filter Set
10 Reviews
Zhumell 1.25" Lunar and Planetary Color Filter Set
  • These filters can be used individually or together to bring out detail in the images you see through your telescope
  • Neutral density filters are useful for splitting binary systems and reducing glare
  • Zhumell filters will fit any standard 1.25" format telescope eyepiece
Bestseller No. 5
SVBONY Telescope Filter 1.25 inches Moon Filter CPL Filter Five Color...
145 Reviews
SVBONY Telescope Filter 1.25 inches Moon Filter CPL Filter Five Color...
  • 7pcs filters set include most popular color planetary and moon telescope eyepiece filters;moon filter;CPL filter;5 color filters with 23A bright red;21 orange;12 yellow;56 bright green;82A bright blue
  • CPL filter is mainly used for elimination of polarized;and enhances the contrast of the moon and planets in photographic images
  • 5 color filters are an essential tool of the lunar and planetary;with red;green;blue;orange and yellow highlight features on Mars;Jupiter;and Saturn
  • High quality aluminum alloy frame and optical glass with standard 1.25” filter threads suitable for 1.25” eyepieces and other accessories
  • Moon and skyglow filter;Cuts down glare and brings out much more surface detail and gives you better contrast; It is a multi-band pass filter transmitting a high percentage of light in the visual spectrum; Effectively filters out selective wavelengths of low-pressure sodium and other man-made sources typically used in street lighting

 

Telescopes Solar Filters

If you are looking to buy a solar filter for your telescope, then let me tell you that it is almost impossible to find the right one for you. The reason is that unlike other filters, solar one does not apply into a standard 1.25 inch eyepiece, but should be put front of the tube, where all light gets in. Now days there is countless types of telescopes in the market with different sizes and solar filter should fit perfectly on your telescope.

Something very important !!!! Never Ever point your telescope to the Sun without sun filter and never look through the eyepiece. You risk losing your eyesight, and damage the telescope.

So, after it became clear that it is difficult to find a ready solar filter for your telescope model, the next thing you can do is to create one. Idid it, and that means everybody can do it too!

telescope solar filters

If you are from those who are not very handy, it means we are much alike. I’m not that “always creating something” person, but my desire to look at the Sun was so big that I couldn’t resist.

For my big surprise making a Sun filter  was not only easy but also very enjoyable work.

After a thorough study on youtube videos I chose the one that most clearly and accurately explain what is needed and what should be done. There it is:

 What you need is:
  • Solar Filter Sheet for Telescopes
  • Pensil 
  • Cardboard
  • Scissors
  • Scotch tape
  • Enthusiasm

The solar sheet can be ordered by the review further down in this page. For my 6 inch telescope, 10 inch square perfectly matched the filter which I made.

Follow the steps in the video and you will succeed. Here are some pictures from my personal experience with the preparation of the filter. And the prize? Well, you will have to look at the Sun with the telescope.

Bestseller No. 1
BP-1212 - Silver-Black Polymer Solar Filter Film Sheet (12' x 12') - 1 ea
770 Reviews
BP-1212 - Silver-Black Polymer Solar Filter Film Sheet (12" x 12") - 1 ea
  • Dimensions: 12" X 12"
  • Make your own solar filter for camera, telescope, finder, binocular or handheld eclipse viewer
  • (Size shown in pictures is 8.5" X 11"); Solar image is yellow-orange; Made in USA
  • Black polymer is the most common filtering material for observing sunspots and granulation through telescopes and binoculars; Consistent yellow-orange solar image, even density with any aperture, and flat surface compared to other thin film filters that have wrinkles and creases; (Sheet is shipped in between cardboard and does not include a storage case)
  • REMEMBER, DO NOT VIEW THE SUN THROUGH AN UNPROTECTED FINDER SCOPE. MAKE SURE TO DETACH OR COVER YOUR FINDER SCOPE IF IT IS UNPROTECTED!
Bestseller No. 2
12 Pieces Christmas Gel Filter Colored Overlays Christmas Correction Gel...
335 Reviews
12 Pieces Christmas Gel Filter Colored Overlays Christmas Correction Gel...
  • Gel filter material: these gel filters are made of high light transmission plastic material, lightweight, steady color temperature and low loss, so they are helpful to use
  • Colored overlays size: each color film sheet is 11.7 x 8.3 inches in dimension, in transparent red and green colors, each is covered with a protective film to avoid being scratched, and the correction gel light filter is easy to peel off and hard to roll
  • Wide applications: transparent color film plastic sheets are suitable for film, video, photo, stage, theater, party, and DJ lighting, good for photo studio flash light, LED lights, and reading problem
  • More other uses: these gel filters also suit for memory albums scrapbooks and various other art projects, can improve clarity, eye movement control and helps kids with dyslexia reduce reading frustration
  • Enough quantity and different colors: 12 pieces of gel light filters in total, includes red and green, 6 of each color, enough for using and sharing with your friends; If there are leftovers, you can make them of different shapes and stick them on the wall or book for decoration; Note: please do not leave the product close to the light which is on, or it will be melted
Bestseller No. 3
eBoot 9 Pieces Gel Filter Transparent Color Film Plastic Sheets Correction...
745 Reviews
eBoot 9 Pieces Gel Filter Transparent Color Film Plastic Sheets Correction...
  • Made of high light transmission: these film plastic sheets are made of high light transmission material with lightweight, steady color temperature and low loss
  • Various colors: these gel filters in 9 different colors, red, yellow, green, blue, purple, orange, pink, grey, fluorescent yellow, each color for 1 piece
  • Combined to use: these gel filters can be combined to create different effects, such as, cool effects, color correcting, good for photo studio strobe flash light LED lights
  • Wide uses: correction gel light filters fit for film, video, photo, stage, theater, party, and DJ lighting; Also suit for memory albums scrapbooks and various other art projects
  • Quantity: 9 pieces of gel light filter in 9 colors, each gel filter size is 11.7 x 8.3 inches, comes with protective coverings, protect the filter from being scratched

 

6 Responses

  • I would love to own a telescope myself. Living in Norway, means not as much light polution as in other places in the world.
    I suppose there is not a one-filter-fits-all-planets filter, but the complete set for different views sounds pretty awesome.

    I am not a handyman either when it comes down making sunlight filters. I am not sure if I would even dare to attempt making such, but it was a clear manual at least.

    Thanks for your review of the lenses. I will bookmark this site, for I should find out more about telescopes before I buy one. I’m not most interested in the sun, but very interested in everything else visible here. Every night I can clearly see the milkyway.
    Got any recommendations regarding a good beginner telescope?

    • Hello Steven.

      Norway is a wonderful country in which, besides the endless night sky, you can also see the northern glow for which I noblely envy you. Unfortunately, light pollution does not depend on the geographical location, but on the size of the city you live in. Larger city – more pollution.

      If you want to get a Тelescope, then here on the site there is a pretty detailed information what you need to know to make a purchase. I have also looked at my favorites of every kind. If you have any questions – I am always here to help.

      Thanks for the comment and good luck!

  • Great post on filters. I love astronomy and do a bit of stargazing myself. I will certainly look to buy a filter after reading your post. I really like the table where it shows what filters to use for what planet. Very informative. I loved your video of polarised light and your images are great. I look forward to more posts from you

    • Hey Harjit 🙂

      Yup, you should definitely try to look with some filter. It’s totally different experience! You can start with that for the Moon. Your eye will appreciate it most and you will be able to see much more details. 

      Cheers 

  • I’ve just gone through your post on filters. Though I’m not astronomy student, yet I love Telescope. And definitely I want to own one. Your write-up is really helpful for mes as I have come to know about filters that are used to observe different planets. Also the video ‘polarised light’ is very impressive.
    Thank you for such great post.

    • Hey Himbru,

      Thanks for the comment! If you have some free time and looking for a new hobby – try Astronomy! Get a Telescope and be inspired every day (actually night, if we have to be more precisely) You gonna Love It. Everyone will! 

      Cheers 🙂

Leave a Reply

Your email address will not be published. Required fields are marked *