Optolong CLS-CCD 2" Mounted Filter

*Used*

●Filter in excellent condition

● Box shows signs of wear

Thanks for looking!

~Description from Highpoint Scientific ~

Optolong CLS-CCD Filter - 2”

The Optolong CLS-CCD filter will boost contrast and increase visibility of faint outer regions on most emission nebulae, planetary nebulae, and supernova remnants from light polluted areas when photographed with a color imaging camera.

The infrared wavelength of 700-1100nm is cut off on the Optolong CLS-CCD Filter, making it different from the standard CLS filter and rendering the CLS-CCD a photographic filter only. There is no need to use a separate IR-cut filter when imaging with the CLS-CCD, because the IR has already been cut for you!

The Optolong CLS-CCD filter works by selectively reducing the transmission of light pollution wavelengths, especially artificial light pollution caused by high and low pressure sodium vapor and mercury vapor lights. Using a CLS-CCD filter will also increase contrast by reducing the skyglow caused by naturally occurring neutral oxygen emissions in our atmosphere.

The Optolong 2” CLS-CCD Filter is made Schott glass that has been multi-coated with ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The 2" filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved. The result is a super thin filter cell that will produce a clear aperture of 45mm.