Thread: Filters for f1.9 use??
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Old 30-01-2013, 12:14 PM
Poita (Peter)
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Join Date: Jun 2011
Location: NSW Country
Posts: 3,586
Take a look here:
http://www.astrograph.de/Page6.html

Not 3nm, but still an interesting test with almost exactly your hyperstar setup.

I don't know who has 3nm filters rated for f1.9 use.
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