Pegasus Astro Photographic Filter - O3 7nm 2" Mounted Filter

Starting Price: $246.00
Price as Configured: $246.00
Brand: Pegasus Astro / SKU: PEG-FLTR-2M-O3
Pegasus Astro has developed 2-inch mounted deep space photographic filters for broadband and narrowband usage.
Price as Configured: $246.00
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The Oxygen III (OIII) CCD 7nm filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm which corresponds to OIII emission lines. This reduces the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, high and low pressure sodium vapor lights, and the natural light caused by neutral oxygen emission in our atmosphere (i.e., skyglow). OIII narrowband filters allow only a small portion of light to pass through the filter, resulting in diffuse and planetary nebulae to appear more clearly against a blacker background of space.

Filter Size: 2 inch
Polish: 1/4 wavefront, Parfocal
Transmission Range: T > 80% 500 nm, 7nm FWHM
Coatings: Multilayer Anti-reflection
Type: Narrowband (7nm)
Shape: Round
Thickness: 5mm (filter) + 2.5mm (thread)
Thread: M48, 0.75 pitch