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
Lead time delivery: 14 - 30 days
Available on backorder
Description
SV220 Telescope Filter 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
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