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Old 07-08-2016, 12:15 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,907
No.
That's how the Solar Ha filters work in double stack mode.
I have a spreadsheet (somewhere! I'll find it..) which shows the results of multiplying two Gaussian curves...
Internal reflections between the filters may be an issue....
Edit - can't upload the spreadsheet - but the attached screen shot shows the results. 3.5nm FWHM
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