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Old 16-04-2019, 10:46 AM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
Jeff,
CaK is a completely different view of the Sun...
The flocculation, plage and sunspots, fibrils are are seen at a different height from Ha. Slightly lower than in the core of the Ha.
The resolution (theoretical) is much higher than Ha (636/380 = x1.7) but the seeing is equally worse!

Unfortunately Coronado no longer produce their CaK filters...only Lunt left in the game unless you DIY.....
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