Svbony SV220 Dual-Band 7nm H-Alpha & OIII Nebula Filter - W9172

Highlights

• Dual Narrow bandwidth H-Alpha/O-III 7nm narrowband filter properly designed for astrophotography both in light polluted
• Take color images without needing to combine images with multiple filters
• Useful for imaging emission nebulae, planetary nebulae and supernova remnants
• Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow

Specifications

Brand	SVBONY
Model	SV220
Name	Duo-Band OSC Filter
Size	2-Inch
Substrate Thickness	1.80mm
Clear Aperture	44mm
Wavelength Range	300-1100nm
FWHM	OIII (7nm) & HA (7nm)
Blocking	OD5
Peak transmittance	500.7nm@T>90%; 656.3nm@T>94%
Surface Quality	60/40
Surface parallelism	1/4λ
Thread	M48x0.75
Single Thread	Yes
Net Weight	12.5g / 0.44oz /0.027lb