its improved
visual view IMHO as good as a double stack filter image
although view is narrow
i tried without much luck to photo it with s8
you can see prom lower right
camera speed is faster than prism rotation
thats why you see 2 tone red
notice viewing area is a square in a circular field
spectrohelioscope at stellafane VT
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Re: spectrohelioscope at stellafane VT
Looks good! Do you have a pic of the setup John?
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