Astrodon 50mm Square Blue Filter
Astrodon Tru-Balance RGB filters have revolutionized CCD imaging. Their popularity is due to ease-of-use, high optical throughput and great resulting color for galaxies, star clusters and nebulae.
This is just the Blue Filter from an RGB set, however- for whatever purpose you might desire to use just the blue filter. Perhaps you are looking for a very specific result in your imaging- or perhaps you lost the blue filter in your set! Either way, this individual filter is a stellar choice!