| A. About Optolong's CLS-CCD FIlter The Optolong CLS-CCD (City Light Suppression) filter is a broadband light pollution reduction filter that is designed to improve the visibility of various deep sky objects. It does this by:
B. Main Uses and Performance
C. Spectral Curve Transmission Characteristics
D. Technical Specifications
E. Optical Coating Specifications
F. Other
WARNING: Optolong filters are not designed for direct solar observation. NEVER use these filters for observing the Sun, or permanent eye and equipment damage will result. Additional Information
How to read the chart? ▲The horizontal axis is the Wavelength in Nanometers(nm). ▲The vertical axis is transmission in %. ▲The RED line shows the transmission of the CLS-CCD filter. Green line shows the emmission of nebula. The artifical emission lines are shown in ORANGE.
Optolong CLS-CCD Performance I. NGC7000 & IC5070 © Wei Guo (China)
II. M42 © Wei Guo (China)
About Optolong While Optolong is a relative newcomer to the astronomy industry, they are no strangers to optics and filters. Optolong is a division of Yulong Optics Company, a high tech company specializing in optical filter design and production. Their products include bandpass filters, flourescence filters, edge filters, longpass and shortpass filters, beam splitters, anti-reflection coatings, optical mirrors and, of course, astronomical filters. |








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