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

SKU: W9187DC-
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;
  • OIII 5nm 2" Filter is designed to deliver 90% transmission at the 500.7nm line which provides you with well defined nebulae structures;
  • 300-1000nm wavelength range; the SVBONY OIII 5nm 2" Filter transmits a 5nm bandwidth of light that is centered at 500.7nm;
  • 2 inch mounted; the filter can thread directly into the 2 inch barrel of your telescope eyepiece.

Note: This OIII filter is NOT for use on the Sun, and also unsuitable for telescopes with a focal ratio below F/5. 

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1 reviews

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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

Features

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.

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