SV220 Telescope Filter 7nm Dual-Band Nebula 1.25/2 inches

SKU: W9172-
US$ 159.99
  • Dual Narrow bandwidth H-Alpha/O-III 7nm narrowband filter properly designed for astrophotography both in light polluted environment. 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.
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                                      SVBONY SV220 1.25/2 inches Inches Dual-Band Filter

The SVBONY 7nm dual band filter is designed to drastically reduce the effect of light pollution. The 7nm bandwidth means it strongly isolates
the nebulae's emissions into H-Alpha (red) and OIII (green-blue) from anything else. It blocks light pollution, maximizes the signal from nebulae,
and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high- and low-pressure sodium vapor lights, and
unwanted natural light caused by the emission of neutral oxygen in our atmosphere.

SV220 Dual-Band 7nm Nebula Filter

Dual Narrow Bandwidth H-Alpha/O-III 7nm Narrowband Filter Properly Designed For Astrophotography
Both In Light Polluted

SV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula FilterSV220 Dual-Band 7nm Nebula Filter

1 reviews

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I'm new at this, so take my endorsement with that knowledge

I'm very much enjoying astrophotography (AP). It is very different from "daytime" photography-- catching photons by the dozens, instead of by the billions. So, one "branch" of AP deals with composition and color of deep space objects (DSOs). It gets deep. There might be some insights-- properties of color and band width and all that. The SV220 (shhesh, read the description above) allows hydrogen alpha (Ha) (think red) bandwidth pass through along with (see "details"). So, if I have a dark sky, very little time, I can shoot some detail in the Orion Nebula, for example. In closing, there are many approaches to processing deep space photos... the "beauty" of not knowing what I don't know allows me to approach the conundrum from a different perspective. (Yes, I will learn, continue studying the "art and science" of astrophotography). Meanwhile I'm kind of enjoying throwing stuff about and seeing what sticks... (not AI assisted).
Brand​ SVBONY​ SVBONY​
Model​ SV220 SV220
Name​ Duo-Band OSC Filter​ Duo-Band OSC Filter
Size​ 2-Inch​ 1.25-Inch
Substrate Thickness​ 1.80mm​ 1.85mm
Clear Aperture​ 44mm​ 26mm
Wavelength Range​ 300-1100nm​ 300-1100nm
FWHM​ OIII (7nm) & HA (7nm) ​ OIII (7nm) & HA (7nm)
Blocking​ OD5​ >OD5
Peak transmittance​ 500.7nm@T>90%; 656.3nm@T>94%​ 500.7nm@T>90%; 656.3nm@T>94%​
Surface Quality​ 60/40 ​ 60/40
Surface parallelism​ 1/4λ​ 1/4λ
Thread​ M48x0.75​ M28.5*0.6
Single Thread​ Yes​ Yes
Net Weight​ 12.5g / 0.44oz /0.027lb​ 7g

Features


1.Dual Narrow bandwidth H-Alpha/O-III 7nm narrowband filter properly designed for astrophotography both in light polluted
2.Allows for imaging in bright man-made light pollution and moonlit conditions
3.Take color images without needing to combine images with multiple filters
4.Most useful for One-Shot Color cameras
5.Useful for imaging emission nebulae, planetary nebulae and supernova remnants
6.High transmission and sharp cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects
7.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
8.The duo-band narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun
9.Be aware that the SV220 is not a great fit for fast telescopes, some users reported that the Duo-Band OSC Filter paired with the RASA caused band shift, thus clipping the HA data.

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