Svbony SV220 Telescope Filter, H-Alpha & OIII, 7nm Dual-Band 1.25" Filter | Urban Emission Nebula Imaging, 85% Transmission Rate with OD5, H-Alpha (656nm) and OIII (500nm) Wavelengths

£98.99 GBP

~~£98.99 GBP~~ £98.99 GBP

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Size Name 7nm 1.25inch 3nm 1.25inch 7nm 2inch 3nm 2inch

Svbony SV220 1.25" Dual Narrowband H-Alpha OIII Filter for CMOS Cameras

SV220 Dual-Band 1.25 inches telescope filter. Product image shows the filter with a night sky and telescope in the background.

The filter is suitable for those astronomers who are already imaging using color cameras and don't want to transition to a monochrome camera set. Use the SV220 Dual Band Filter to help you view clearer deep sky images.

Duo-Band OSC Filter lens for astrophotography, shown against starry sky background. Demonstrates light pollution reduction for celestial imaging.

SV220 telescope filter can help us to dealing with light pollution that is becoming more and more prevalent

The higher the OD, the cleaner the filter cut-off

Designed to sharply cut off inference of artificial light

Ability to Photograph in moonlit conditions

1.25-inch Dual Band Filter Size
Contrast and visibility of deep sky objects such as emission nebulae is improved. Design for the high light polluted location like city
install the filter as the guide

Block urban light pollution

Enhance the light at H-Alpha (656nm) and OIII (500nm) wavelength. With a bandwidth of ±3.5nm centred on the 656nm and 500nm wavelength of Hα and OIII, for a total of 7nm. Effectively passes Hα and OIII light, resulting in clearer images. Suitable for imaging emission nebulae (not for imaging reflection nebula)

Astronomical filter with wavelength specifications for H-alpha 656.3nm & OIII 500.7nm, showing filter unit and corresponding spectral graph.

Svbony Product

	Telescope Color Cameras Buying Options	Telescope Filter Drawer	Telescope Refractor OTA Buying Options	Svbony SV220 3 nm	Zoom Telescope Eyepiece	Multi-bandpass Filter	Zenith Dielectric Mirror
Customer Reviews	75	230	136	7	80	34	270
Price	—	£55.99	—	£129.99	£129.99	£139.99	£54.99
Model	SV705C	SV226	SV503	SV220	SV215	SV260	SV188P
Feature	IMX585 color CMOS	M48x0.75/M28.5x0.6(female)	80ED F7	3nm	3-8mm focal length	SV260	Dielectric coatings
Feature	ST4 guiding por	Lock screw	Dual-speed rack	average OD5 cuttoff tech	Constant 56° AFOV	SV260	99% reflectivity
Feature	Back illumination structure	M42-M48 adapter	Low dispersion	85%+ transmission rate	10mm eye relief	Emission Reflection Nebula	Brass pressure ring
Application	Deep Sky Photography	Deep Sky Photography Visual	Deep Sky Photography Visual	Deep Sky Photography Visual	Astronomical Observation	StarField Photography	Planetary Deep Sky Visual

Specification

Size	1.25 inches
Lens Ring Size	Φ31.75x7mm
Weight	5.4g
Thread	Male Thread
Thread Specification	M28.5*0.6
Material	6061TAluminum
Manufacturing Process/Surface	CNC/Blackening and matting oxidation

Dual narrowband telescope filter; duo band filter passes light at Hα 656nm and OIII 500nm wavelength; reduce the interference from natural light sources such as moonlight or artificial light pollution
1.25" standard interface; Svbony SV220 can be used with all astronomy cameras and Electronic Filter Wheels or other telescope accessories; help improve the contrast and visibility of deep sky objects such as emission nebulae using a OSC camera
Astrophotography; this Svbony filter enhances contrast during visual observation of gaseous and planetary nebulae in all sky conditions; allows high-contrast imaging even in areas with strong light pollution
Improving contrast; central wave length reach 500.7nm; an increase in contrast can be perceived as an increase in brightness; SV220 nebula filter makes the contrast of the nebula and sky background increase not the nebula bright
Easy to use; SV220 dual-band filter makes it possible to simplify and decrease the difficulty and cumbersomeness of post-processing for users
Aluminum alloy rim; SV220 light pollution filter can be fitted to all kinds of astrophotography instruments; with a black matte finish to reduce glare and ghost image
Multi Resistant Coated; strong resistance to stains water and scratches; effective in extending the life of the filter

› See more product details

Brand	SVBONY
Material	Aluminium
Photo filter thread size	31.75 Millimetres
Coating description	Multi Coating
Photo filter effect type	Enhancing
Water resistance level	Water Resistant
Product dimensions	7.5L x 7.5W centimetres
Photo Filter Size	31.75 Millimeters
Number of items	1

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Let customers speak for us

from 97 reviews

Fits perfectly, raises the dwarf high enough to clear the clamp screw

David

07/05/2026

OA Skywatcher EQ Wedge Riser v2

You’ll be glad you got it with the filter holder.

I paired this with my OakAstro filter holder to raise the Seestar S50 above the SkyWatcher Star Adventurer Wedge so the S50 rotates freely and the filter holder does not foul the wedge. It’s a simple device but quite important to the overall performance.

Tony Dodd

06/22/2026

A great business to deal with.

Searching for something for my SeeStar I came across Oak Astro. I received fast responses to my questions and a very prompt despatch (and delivery) of goods I ordered. Just the sort of business I like to deal with!

06/16/2026

Oak Astro

Simple and very effective.

It is hard to fault this device! I bought it because I wanted to add different filters to my SeeStar S50 and because I wanted to reduce extraneous light getting in. It works on both counts. I recommend users read the manual as the mounting flap could easily be damaged by not following the publiushed guidance.

Seestar S50 OA-OAKv2

S50 OA -OAKv2

All arrived in good condition, a nice update from the original set,just waiting for dark enough skies to put them to use

D Clarke

Game changer

Great bit of kit, dew shield and filter holder all in one. Its a clever design and a game changer. Make sure you read the accompanying instructions to make the installation and removal easier.

Paul Maddocks

05/30/2026

Superior Quality

All of the accessories are very well made and top quality. My favorite one is the dew shield. It has a little more length than other competitors and the internal flocking really make a difference.

John Walker

05/27/2026

OA-DL-Mini-OAK

Excellent

Excellent quality

Tobias Fredeking

04/24/2026

OA-D3OAK Dwarf 3 Optical Accessory Kit

Excellent Accessory Set for Dwarflab Mini Smartscope

I recently ordered Oak Astro's dew hood,bahtinov focus mask and star diffraction set.
Firstly, I live in New Zealand, about as far away as one could possibly be from Oak Astro, I was highly impressed with the fast delivery time.
Upon inspection, the items delivered are robust, of very high quality and precision manufacture. The threaded components mate perfectly. The dew hood is internally flocked and has absolutely no internal reflections.
Owing to poor viewing conditions (overcast, cloudy nights) I have not yet had the opportunity to test the items on any astro objects, however I have no reason to doubt that they will perform as advertised.
The accessory carry bag is a nice bonus.
In conclusion, I highly recommend this product to other Dwarf Mini users.

Russell Colina

04/15/2026

Great Quality on both the Mini and the D3 items

Great Quality on both the Mini and the D3 items I purchased. Very happy.

Mr Simon Thompson

04/14/2026

Really enjoying using the Dwarf3 accessory kit

Really enjoying using the Dwarf3 accessory kit. Was packaged well, came with a useful storage bag, and shipped quickly. Thanks.

Nancy S.

Easy to use, great results

I've been using the dew shield since I received it, and have been very impressed. Full disclosure: I ordered and have been using itmore as a lens hood than to counter dew as so far I have not been imaging near to the dew point here in France. As a lens hood, it has been excellent and has helped a great deal! The street lights here switch off at 11 PM, but with the shield on my Dwarf Mini I've been able to get images (of clusters) even when the nearest streetlight on the road above is inside the wide-angle camera's field of view. I've also noticed improvements when imaging away from that light, as the hood keeps light from elsewhere in town getting to the lens directly.

I feel that I should also note that, despite the hood blocking part of the wide angle field of view (as was noted in the description), this does not appear to affect the deep sky mode at all. I have not as yet noticed any effect on the ability of the Mini to calibrate, to set up EQ mode, or to find, goto, and track targets.

Derek MacColl

04/07/2026

Dwarf 3 Optical Kit Perfection

Love it. Exactly does what I needed it to do. Excellent Quality.

Barb Arsenault

04/03/2026

Excellent for my Dwarf 3 system

Excellent for my Dwarf 3 system, especially the light shield due to streetlights.

Neil Dyson

03/27/2026

Livraison rapide et conforme

Livraison rapide et conforme , objet de très bonne qualité.
Je recommande !!!👍

Anonymous

03/20/2026

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Svbony SV220 Telescope Filter, H-Alpha & OIII, 7nm Dual-Band 1.25" Filter | Urban Emission Nebula Imaging, 85% Transmission Rate with OD5, H-Alpha (656nm) and OIII (500nm) Wavelengths