Optolong Moon and Skyglow Filter 1.25 2459313 excellent image results have been

excellent image results have been seen of the lunar surface whilst the sun is still 35 degrees above the horizon

which means you can switch out eyepieces within the series during observing sessions and little or no additional focusing will be required

A parabolic or more accurately a "paraboloidal" mirror

Compatible with Astronomical Filters

Optolong Moon and Skyglow Filter 1.25 2459313 excellent image results have beenOptolong Moon and Skyglow Filter 1. 25 Optolong Moon & Skyglow filter is designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. Its high efficiency preserves image brightness, reveals more details and increases contrast of moon, galaxies, nebulae and globular star clusters. Main Use Ideally it is quite versatile filter for visual observation and astrophotography on