The Dutch Observatory

Another day of experimenting with my new filter.  Today a full disk image of the Sun, a closeup of  AR1665, 67 and 68 using the SM40, A closeup of 1665, and finally a closeup of AR1665 using the C11 with the Baader 3.8 filter and an Orion gree RGB filter.

I did experiment with my new Baader filter made from 3.8u Solar film.  This film lets much more light through than the normal 5.0u film used for observing.  This allows additional filters to be used behind the whitelight filter.  I ran a whole series of tests and put this composite together of the best images in each case.  The four images shown were made with:  90mm Orion Refractor and a Lunt wedge, a 90mm Orion Refractor with a 40mm Lunt single stacked Ha etalon, a Celestron C11 with the Baader 3.8 filter and an Orion Red RGB filter.  the final image in the group is made with the Celestron C11, the Baader 3.8 film and a green RGB filter. The single image is made with the Lunt 40mm etalon and a blocking filter on the Orion refractor.

A new Carington Rotation started on the 25th, so I am late posting the images captured on January 31.  Conditions weere not good so today only a whole disk capture.