SVW9172B

W9172B

SVBONY

This SV220 H-Alpha/O-III 7nm Dual-Band Narrow Filter from SVBONY will enhance the contrast in photos of nebulae while also reducing the effects of artificial light pollution and moonlight. The filter passes narrow 7nm bands of light emitted by double-ionized oxygen and hydrogen-alpha, sharpening the contrast between the night sky and emission and planetary nebulae in your images. The mounted filter is for use only with telescopes with a focal ratio of f/5 and higher.