Feature

●Using high quality optical glass, the surface of the filter is extremely precise and allows you to observe and shoot in high resolution
●It cuts out wavelengths in light pollution areas such as mercury and sodium, while allowing the OIII (496nm & 500nm), Hbeta (486nm), NII (654nm & 658nm), Ha (656nm), SII (672nm), making it suitable for eye observation of nebula, star clubs
●CLS have a wider pass-through range than UHCs, which is more common when seen under light to medium light pollution
●Aviation Metal Materials, Precision CNC Machining, Sand Blasting Process, Black Anodized, Matte Processing to Prevent Reflection, Laser Engraving Will Not Tarnish
●Note: Light pollution filters will not remove the effects of light damage or increase the brightness of objects Just enhance the contrast of nebula and night sky without brightening up the nebula. WARNING: Optolong filters are not suitable for solar observation. If you do not follow the warning, your eyes will be invisible


Description

OPTOLONG CLS Astronomical Observation Photography Filter (2.03 inches (50.8 mm)