Walter Scott Houston reports that he used an OIII filter naked eye to
view the California Nebula, on page 34 of Deep-Sky Wonders. He did it
from the dark skies of Mexico, in the winter.


"etok" wrote in message ...
Anyone here tried looking at the sky through a pair of OIII filters on a
dark night under good conditions?
I'm curious if you can see, say, the veil in Cygnus just hanging in the sky.