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SV128 Variable Polarizing Eyepiece Filter for Viewing the Moon and Planets
Reducing the amount of light entering the eyepiece increases the contrast between the moon and the star, allowing you to see more details about the moon and the stars.
Note: Do not look at the sun with SV128 Variable Polarizing Filter. You would be blind if you fail to observe the warning.
Use SV128 Polarizing Filter’s effect
Prevent excessive exposure
Reduction of clear image eliminating reflection
Increases the contrast between the moon and the planets
Increase the sky color saturation
SV128 Variable Polarizing Filter
Reduces brightness of the Moon or planets for great clear viewing
Reduces glare, increases contrast and maintains night vision.
Good for observing details on bright objects such as the Moon or certain planets.
A Variable Polarising Filter is essentially two polarising filters, one screwed into the other. Simply rotate one in its cell to reduce brightness from 40% down to as little as 1%.
The filters can also be used individually for terrestrial daytime observing to reduce sunlight glare from lakes, oceans or window glass.
Optical glass lens
Manufactured from optical glass with a neutral density (so no false colour) mounted in a machined black-anodised aluminium cell.
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Available in 2” sizes to fit most astronomy eyepieces and accessories.
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Package Includes:
1* SV128 2" Variable Polarizing Filter
1* Sturdy Plastic Case
Lance T
2025-08-13 13:48:21
Fantastic Addition to My TelescopeThe SVBONY 1.25" Variable Polarizing Filter has significantly enhanced my stargazing experience.Excellent Performance:This filter greatly reduces glare and enhances contrast, making celestial details much clearer.Easy to Use:It fits perfectly on my telescope eyepiece and is easy to adjust for the perfect amount of light.High Quality:The build quality is solid, and it feels durable and well-made.Overall, this filter has been a game-changer for my astronomical observations. Highly recommend it to any stargazing enthusiast!
maryeliz1963
2025-08-10 16:34:04
I was shopping for a 2 inch Polarizer for my 127mm Maksutov-Cassegrain and the SvBony filter was just what I needed. It is well constructed and the visuals of the Moon, Jupiter, and Saturn are incredible. Glare is reduced and contrast has increased. The reviews and pricing was a selling point to purchasing this filter. I highly recommend this filter and seller.
The Doctor
2025-07-29 16:41:32
I'm very impressed with this SVBONY variable polarizing filter.When I got into astronomy decades ago, I needed an entire set of fixed polarizing filters for different uses and conditions. This filter has become my "one size fits all" polarizing filter solution! It's not only great for 'dimming down' the very bright moon (of course) but works great for bright planets like Jupiter and for solar astronomy -- when using an over the aperture optical grade solar filter. I particularly enjoy solar astronomy and this variable filter not only helps bring out planetary features like the bands of Jupiter but features of the sun like sunspots and faculae. It also works very well when using an eyepiece projection into a camera (or even a smartphone, like I use). Important: NEVER use a camera or look at the sun through a telescope without using an optically rated, over-the-aperture solar filter (as shown in my photos).Yes, it' is somewhat inconvenient to remove the eyepiece in order to make adjustments, but it's not nearly as inconvenient as removing the eyepiece, unscrewing a filter of a specific percentage, screwing in a different fixed percentage filter, then putting the eyepiece back in … only to do it all again if the fixed percentage filter you choose was still not right for the application. The range of percentages on this SVBONY variable polarizing filter is great, the filter's optical quality seems excellent and it's adjustment is very smooth.This is my first SVBONY product purchase, but certainly not the last.
ow
2025-06-20 10:33:03
Very good. Could have had a little Knurling to aid the functional use in rotation.
Bmb66
2025-06-18 11:02:59
I had a friend recommend this to me when I was viewing Jupiter. Without it I was not able to See see the bands of Jupiter. This is my go to filter for lunar and planetary viewing. I love the variable polarization. I only have to use this one filter for multiple targets. Just pull the eye piece and adjust for the contrast you would like. No more fiddling with different filters. I recently upgraded to 2 inch eyepieces so I purchased the two inch version also. SVBONY Has great products at an affordable price. I have many of their eye pieces a dew heater and Phone mounts and haven't had an issue with any of them.
IT Guy
2025-06-13 12:27:39
Variable filter for observing bright objects in the night sky like the moon and planets. The variable darkness makes this ideal for all levels of filtering needs.
Barbara R
2025-05-28 16:04:06
Used this filter with Explore Scientific and Baader 2†eyepieces; it fit both perfectly. Twisting the filter to adjust it has some resistance so that when you screw it onto the eyepiece it doesn’t change your setting.
KRAM02
2025-04-27 14:39:36
Keeps me from blinding myself looking at the full moon with a 10" dobsonian
LAZARO VERA
2025-04-26 17:22:58
Ya lo he probado y funciona excelente...al menos los pocos dÃas que he probado este filtro para observación es muy bueno...
ecw
2025-04-23 14:32:17
At low, medium and high polarizing settings it does not appear to harm the clarity of the view. Just does its job of reducing light. Very happy with it for the price.
Rachael
2025-04-14 14:01:17
Great product, I use this to add to my telescope as a brightness function
Alan Ridley
2025-01-26 14:24:35
This filter helps cut reflected glare
LUIS SILVA
2025-01-02 15:48:27
Muy practico de usar y robusto
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