OPTOLONG CLS FILTER Tilter Carbon fiber

Carbon fiber

The Sky-Watcher Light Shroud is an essential accessory for every Collapsible Dobsonian Telescope for high image contrast

Earth rotates with respect to astronomical objects

you can use all the aperture you paid for

OPTOLONG CLS FILTER Tilter Carbon fiberThe Optolong CLS (City Light Suppression) broadband filter is designed to improve the visibility of emission deep sky objects. It selectively reduces the transmission of wavelengths of artificial light, specifically those produced by mercury vapour lamps, both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i. e. skyglow). The high transmission in the main nebula emission