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The first two are in pixel at 0.2A/pixel and show the resonance pattern of the etalons; each peak shows the bandwidth and the spacing the "finesse"
Yes, the last two are the blocking filter (with the superimposed Ha line)
I'll repeat the testing with a fixed etalon and calibrate it in A -
The main issue is the 10A finesse which would need a 5-7A blocking filter....(you can see how little light the blocking filter passes...so there's never a safety problems upstream of this filter ie your eye!)
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