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Hi Chris
Using a Thousand Oaks solar filters on my Vixen 4” F9 refractor produced a flare or hot spot from a reflection that I just could not get rid of, no matter how I fitted and rotated the filter.
As a result, I changed to the Baader solar film and I am very pleased with the results. I also prefer the cooler colour of the Baader to the more orange warm colour of the Thousand Oaks.
Note that the Baader solar film comes in two grades; one that allows visual and photography, the other for photography only as it transmits much more of the visual spectrum but is completely unsuited and dangerous for visual.
I hope you get to see what should be an awe inspiring event.
Cheers
Dennis
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