Thread: Etalons .. ?
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Old 23-04-2014, 04:14 PM
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Merlin66 (Ken)
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Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
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Interesting,
They don't quote the FWHM ( you need around 0.5-0.7A for Ha and at least <2A for CaK.)
The sizes are about the same as the PST and Lunt internal etalons, but I bet the price is x10!
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