Here is M27 in OIII. This picture is a stark contrast from the H-alpha. The OIII emission is mostly what we see when we look at the nebula, which is very bright. My most memorable view of it was from very dark skies in Idaho through an 80mm refractor. Under such skies, M27 looks like a cotton ball hanging in space. This is 8x720" with the SXVF-H9 through an Astronomik 6nm OIII filter and the CFF 290 Classical Cassegrain.
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