Next time I have the scope out I might take out one of the colour filters and put in the OIII. I always thought the difference between OIII and UHC was fairly minor, but it is very hard to remember the subtleties of an image "in your head". It would also be a great way to compare filters by the different manufacturers too. I might give this a bit of a go at Ballarat next month to compare various UHCs.
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