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Old 27-08-2013, 10:15 AM
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RickS (Rick)
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RickS is offline
Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
I like the additional contrast and fine detail that I get from the 3nm Ha and OIII filters. They also deal better with a bit of moonshine.

Both times I bought 5nm filters (50mm round and then 50mm square) I ended up upgrading to 3nm.

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