Colour filters, nebula filters, filters for astrophotogrphy

Filters are very important in astronomy. They increase the contrast of certain celestial objects or reduce the brightness of objects for a safe and unstressed observation.
On this page, you can find filter for visual observation (marked with an eye symbol) and for astrophotography (marked with a camera symbol).
Moon and planets: colour filters and neutral-density filters
Deep-sky viewing: nebula filters for observing
Astrophotography: nebula filters, DSLR filters and L-RGB filters