Sun in CaK / White Light With Explore Scientific AR152 Refractor + Lunt CaK filter or Baader Wedge Uploaded 7/16/22 Daily Report For Saturday July 16, 2022
Images below are 1290 wide and non clickable
A rare clearing in the Arizona monsoon clouds this morning, and we were out again shooting a very active Sun! Six major sunspot groups today and I was able to (battling clouds) shoot all of them in both the green Iron lines here as the white light, and a second set with the Lunt Calcium K filter. Seeing was bad, about 1.5/5 and granulation was only visible on the screen about 5% of the time.
WHITE LIGHT:
Lets start with this disk wide shot, consisting of two prime focus shots with the 6 inch stopped to 4 inches to show the major spot groups. As usual, a Baader wedge was used for these white light shots, and a Baader Continuum filter which is a narrow band green Iron line.
Now we move to 5x and push the seeing to its limits. Here is a set of images of each group close up!
Calcium K shots. These are usually pretty hard to get good shots when seeing is bad because seeing in UV is always worse. These came out pretty good, and shows what you can do with a 4 inch aperture and a cheap B600 filter with a crippling vignette, which was flat fielded out. The magnification here is about 1.5x to achieve a slower focal ratio to keep the filters bandpass narrow...
