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New Solar CaK filter assembly
Just completing a new CaK 2A filter assembly.....
This version is based on a 2" Baader Blue CCD filter as an "ERF" give a good UV cut below CaK (393nm) and above about 520nm.
Then follows a #1 "Yellow" filter removed from a CaK PST. This has a bandwidth of 2A centred on CaK.
The third element is an Omega 2A CaK filter (as a double stack)
The initial results look promising...
bright speckles show the narrow bandwidth!
I need to consider whether or not at add a tilter to each or either of the 2A filters to fine tune the CWL.
Used with a stopped down ED80 (60mm f10) and ASI 1600MM.
Firecapture, AS3!, ImPPG, Corono
Onwards and Upwards.
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