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

SV227 H-Alpha 5nm Filter 2" Narrowband Astronomical Photographic CCD for Deep Sky

SKU: W9187DB
-13% US$ 129.99
List Price: US$ 149.99

The SVBONY H-Alpha is an extremely narrow emission-line filter that works by allowing a 5nm bandwidth of light, centered on the 656.3nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths. Wavelengths that are responsible for natural light pollution, or skyglow, are drastically reduced, as is artificial light pollution caused by high- and low-pressure sodium vapor and mercury vapor lights. This H-Alpha filter also blocks infrared wavelengths from 700nm to 1000nm so you don't need a separate IR-Cut filter.

Please Note: This h-alpha filter is NOT for use on the Sun.

In Stock Out Of Stock

0 reviews

Write a review


Model SV227
Type H-Alpha Filter
Size 2-Inch
Wavelength Range 300-1000nm
CWL 656.3nm
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. H-Alpha CCD narrow band filter reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural)
  • 2. 300-1000nm Wavelength Range; the SVBONY Sulfur II 5nm Extra Narrowband Filter transmits a 5nm bandwidth of light that is centered at 656.3nm
  • 3. German imported glass; multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition
  • 4. CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading
  • 5. 2 inch mounted; metal filter cell threads directly into the 2 inch barrel of your telescope eyepiece

Ask About This Product