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Old 10-06-2012, 02:51 PM
casstony
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casstony is offline
 
Join Date: Feb 2006
Location: Warragul, Vic
Posts: 4,494
No worries Baz. There's a brass cylinder on the side of the scope which is screwed in or out to change air pressure. AFAIK, the etalon is static and there's something about how the air behaves at different pressures relative to the light which causes the tuning to happen. There's definitely no tilting in a pressure tuned filter.

The imaging guys must be asleep or on holiday - I'm sure they'll turn eventually
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