Anyone have an image or drawing of what the histogram of the Sun looks like when a tuneable etalon is at 656nm (Lunt 80mm THa single stack). I am having trouble visually seeing much on the surface of the Sun (old age?) when trying to tune the etalon so I decided to use the histogram and try and find the sweet spot and then use a CCD to image it, but I need to know what the histogram should look like when I get to that spot. I have read that the histogram flattens out at that point. I was hoping someone else had crossed this bridge and had made note of the histogram when tuned. My Google searches have been unfruitful.
Somewhere to ask questions about the best way to use SharpCap
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