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Eris
14-11-2020, 05:09 PM
The two images of the Sun with AR2781 were recorded with a C11 in woeful seeing this morning.
However the prime aim was to test contrast features between two filter sets used. The white light image was filtered using an Astronomik G filter type 2C while the one in UV was taken with an 18A Filter with an IR blocking filter added. While the imagery is not great I think the results warrant another try with this filter set in better seeing next time.

Max Vondel
14-11-2020, 09:00 PM
Definite contrast increase with that blue/purple filter
Reminds me of the Coronado K telescope!
I wonder what ever happened to those?

Martin_S
14-11-2020, 10:20 PM
Interesting experiment Max. Here is a link that may interest you.

https://astro.ecuadors.net/imaging-the-sun-in-white-light-and-baader-solar-continuum-or-other-color-filters/

Martin