Best filter for Fox Fur Nebula DSLR
Posted 26 February 2020 - 01:58 AM
Posted 26 February 2020 - 04:06 AM
Theh Constellation Guide say that it is Red from Ha emission and some Blue from reflection.
Images seem mainly blue but that I suspect is artistic licence, which can be a pain in the rear.
Transmission of the Astronomik CLS filter appears a good fit. It passes the Ha region and the Hb+OIII region fairly broadly. You are likely to want a broad pass at the blue end. since the wavelengths are less well defined as they are reflection not emission.
Durations depends on you. I go for shorter durations and more, but no guiding and I find that maintains the star colors. Since the nebula has hot new stars it is likely irrelevant to you as they will all appear bright white.