I observed color in a nebula for the first time this past weekend when looking at the Ring Nebula through my Orion XT8. I noticed a bit of red on the outer edges. I placed my Orion Ultrablock Narrowband filter on to attempt to observe more detail when I realized that it washes the field of view out in green, so I could no longer see the red.
Is this normal? Are there any other narrowband filters that preserve color?