April Photography Season Support! All Photography Bundles 20% Discount!   >>shop now ×

SV227 OIII 5nm 2" Filter Narrowband Astronomical Photographic CCD Filter for Deep Sky

SKU: W9187DC
-13% US$ 129.99
List Price: US$ 149.99

The SVBONY Narrowband OIII filter is designed for nebula observation allowing 5nm bandwidth of light centered on a wavelength of 500.7nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high- and low-pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere.

Please Note: This OIII filter is NOT for use on the Sun.

In Stock Out Of Stock

1 reviews

Write a review

A true OIII Filter that works awesome!

I bought the filter in 2 "for my Svbony SV503 102/714 refractor and my Skywatcher 250P Newton. The filter does exactly what it should. It lets the light of the ionized oxygen through between 495nm and 500nm. I tested it together with the Baader UHC-S filter. The Svbony OIII Filter emphasized the contrast on different nebulae more than the UHC. I noticed a difference in particular with the dumbbell nebula and the ring nebula. I was very pleased. I can absolutely recommend the filter for observation.


Model SV227
Type OIII Filter
Size 2-Inch
Wavelength Range 300-1000nm
CWL 500.7nm
FWHM 5nm
Peak Transmittance ≥90%
Substrate Thickness 1.85mm
Wavelength Range 300-1000nm
Blocking ≥OD5
Clear Aperture 44mm
Surface Quality 60/40
Surface Pparallelism 1/4λ
Parallelism 30"
Thread M48x0.75
Single Thread Yes
Net Weight 12.5g / 0.44oz/0.027lb


1. SVBONY 2 inch OIII-CCD 5nm Narrow-Band filter for deep sky 2" mounted; can enhances the contrast between the target and the sky; allowing you to capture high-quality images even under the urban sky; suitable for lightly polluted urban areas and relatively dim launch nebulae
2. 5nm Extra Narrowband Filter; the Oxygen III 5nm Extra Narrowband Filter transmits a 5nm bandwidth of light that is centered at 500nm and drastically reduces other transmissions; including wavelengths of light that are responsible for light pollution
3. High-quality materials; the SVBONY 2" Filters are made glass import from germany that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength; or CWL
4. High-level manufacturing process; the filter cell is made of lightweight;strong metal and is CNC machined; sand-blasted; black anodized; and then laser engraved; the result is a super thin filter cell that will produce a clear aperture of 45mm
5. Powerful functionality; like all SVBONY filters that are designated as "CCD"; this OIII also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter; make your use more convenient

Ask About This Product