Filters for astronomical observing come in three major flavors: nebula filters for deep-sky observing, planetary filters, and solar filters.

Observing Basics: Visual Solar Filters Learn how what Senior Editor Michael E. Bakich calls the least appreciated observing accessory can help you spot granulation and track sunspots on our home star.

Knight Optical can offer UV interference bandpass filters for use in Astronomy. We supply a range of UV interference bandpass filters for a range of applications – all individually QA checked and ...