Celestron Filters CLS RASA Origin (82865)

The CLS broadband filter is designed to improve the visibility of deep-sky objects by reducing the effects of light pollution. Emission nebulae emit light primarily at specific wavelengths, such as Hα at 656 nm, Hβ at 486 nm, and OIII at 496/501 nm. This filter allows these wavelengths to pass through while blocking unwanted light from other sources. By filtering out "bad" light and transmitting "good" light, the CLS filter significantly enhances contrast, making deep-sky objects more visible, even in light-polluted areas.

Key Features:

• Enhanced Visibility: Improves contrast for emission nebulae and other deep-sky objects by blocking unwanted wavelengths.

• Selective Transmission: Passes Hα, Hβ, and OIII wavelengths while suppressing other light sources.

• Ideal for Light-Polluted Areas: Reduces the impact of city lights for clearer observations and astrophotography.

• High Contrast Results: Delivers sharper and more detailed images for both visual use and photography.

Specifications:

• Free Transmission Diameter: 24mm

• Filter Thickness: 2mm

• Frame Type: Ring

• Glass Material: SCHOTT B270

• Transmission Efficiency: 85%

• Mount Material: Aluminum

• Coating: Multi-coated for optimal performance

Appropriate For Use With:

• Filter Thread Size: M28.5 x 0.6

General Information:

• Type: Filter

• Build Type: Broadband Filter

• Height: 6mm

Area of Application:

• Useful for Photographs: Yes

• Visually Useful: Yes

• Twin Stars Observation: No

• Moon & Planets Observation: No

• Nebulae & Galaxies Observation: Yes

The CLS broadband filter is an excellent choice for enhancing the observation and imaging of deep-sky objects. It is particularly effective in urban or suburban environments where light pollution would otherwise hinder visibility. This filter ensures higher contrast and improved image quality, making it a valuable tool for astrophotographers and visual observers alike.