Solar CaK 201121 -filaments!

[Merlin66 (Ken)]

My usual DIY CaK filter has a bandwidth of 1A just to the blue side of the CaK CWL.
The images today are as usual - reasonable seeing, spots visible etc.
A MiniSHG CaK image has a bandwidth around 0.2A () and can be placed exactly on the CaK CWL.


The MiniSHG shows the extensive wispy filaments (around 7 o'clock) and a filaprom (around 1 o'clock)
On this occasion the MiniSHG came out best!!!


I'd be interested to see some other CaK images from the Lunt filter for comparison.

[h0ughy (David)]

Now that's way Cool

[Eris (Gerard)]

That is a fine set of Ca K images Ken. It's good that you have found some clear patches of sky to make this record. Totally clouded out here.