Kenko Starry Night Prosofton Effect Filter, Diameter 67 mm, Reduction of Light Pollution & Soft Effect, for Shooting Starry Landscapes, Made in Japan 549612

Reduce light pollution and accentuate the constellations: The filter suppresses the colour cast caused by sodium vapour lamps, mercury lamps, etc., but allows the light of the bright stars to pass through, highlighting the constellations. Effect1. Light pollution reducing effect to contain colour casts caused by city lights.】Sodium vapour and mercury lamps as well as other street lights cause yellow and orange colour casts in the night sky, but "Starry Night Prosofton" only cuts out the light at certain frequencies that correspond to these colours, allowing natural colour reproduction. Effect 2. Soft effect that highlights the image of the constellation while the landscape and background remain clear. The blur effect is only applied to spot light sources such as stars and does not affect the surrounding landscape, making it suitable for star-studded landscapes or if you do not want to apply blur effects to objects other than stars. Works perfectly with wide angle lenses: Since two effects can be achieved with a single filter, there is no need to stack filters and reduce the risk of vignetting and scattered light. Filter size: φ67 mm / Made in Japan