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2inch SHO Filter Set H-Alpha OIII SII 7nm

SKU: F9169B-W9121B-W9122B
-10% US$ 395.99
List Price: US$ 439.99

The SHO filter is highly transparent, allowing the emission spectrum of the nebula to collect as much energy as possible by accumulating exposure. There is higher contrast and the level of the nebula is richer and more delicate.

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2 inch SHO Filter Set H-Alpha OIII SII 7nm for Deep Space Objects

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Specifications

Model F9169B W9121B W9122B
Spec H-Alpha 7nm OIII 7nm SII 7nm
Transmission Line Wavelength 656nm 500nm 672nm
Thread M48*0.75 M48*0.75 M48*0.75
Size 2-Inch 2-Inch 2-Inch
T peak 80% 80% 80%
Infrared wavelength 700-1100nm cut-off 700-1100nm cut-off  -
0.1% transmission Hg at 435nm and 578nm at 435nm and 578nm  -
0.1% transmission Na at 589nm at 589nm  -
Wavelength Range 300-1000nm 300-1000nm 300-1000nm
Blocking OD3 @300-1000nm OD3 @300-1000nm OD3 @300-1000nm
Clear Aperture 45mm 45mm 45mm
Surface Quality 60/40 60/40 60/40
Surface parallelism 1/4λ 1/4λ 1/4λ
Parallelism 30" 30" 30"
Glass Thickness 1.85mm 1.85mm 1.85mm
Machined CNC machined CNC machined CNC machined

Features

  1. The H-Alpha 7nm is an extremely narrow emission-line filter that works by allowing a 7nm bandwidth of light, centered on the 656nm 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. The result is a high contrast image that reveals the H-alpha line in all its glory

2. The Sulfur II 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). Like all SVBONY filters that are designated as “CCD”, this SII filter also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter

3. The Oxygen III 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 500nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). 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

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