Thread: Etalons .. ?
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Old 23-04-2014, 05:16 PM
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Merlin66 (Ken)
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Location: Junortoun Vic
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Peter,
No.
Both Coronado and Lunt still use air-spaced etalons.
The air gap is around 0.7mm for Ha which gives a bandwidth of 0.7A and a FSR around 10A.
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