CLS filter for Vespera

The Vespera light pollution filter or CLS (City Light Suppression) filter allows you to improve the quality of your photos when observing in the city or suburbs. It attenuates the effects of light pollution and thus increases the contrast between the photographed celestial object and the background sky.

The broadband filter blocks wavelengths emitted primarily by urban night lighting or unwanted natural light, while allowing the main wavelengths of celestial objects to pass through. The anti-light pollution filter is especially useful for improving the brightness of deep sky objects: nebulae, star clusters, galaxies, etc. It is especially effective in emission nebulae due to the filtered wavelengths.

Designed specifically for the Vespera lens, it fits easily and discreetly onto the optical arm. The lens ring that holds the CLS filter is equipped with an electronic card that allows Vespera to detect it. The filter is delivered in a transparent box.

Instructions for use

• Remove the standard Vespera lens ring and insert the light pollution filter until you hear a click. To verify that the light pollution filter is in place correctly, connect Vespera to your mobile device and launch the Singularity app. In the Space Center and then on the Instrument screen, the word "CLS" is displayed.
• The filter has limited use when observing the Moon, stars and planets, which are very bright objects.
• It is designed for use in urban or suburban areas or in the presence of ambient light. It is not necessary to use it in an environment with ideal viewing conditions.
• Because the filter allows less light to pass through the sensor, the stacking speed may be slightly affected.
• The light pollution filter is ineffective against LED lighting.
• Do not expose the filter to direct sunlight.
• Store the filter in its case after each use to prevent dust buildup.
• If you notice streaks or dust, gently clean the filter with an optical cloth, microfiber cloth, duster, or air blower.
• Do not try to open the lens ring containing the filter.