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Kenny,
For imaging certainly yes!
For visual probably not. Some visual observers find the view through the double stack to be very dark - something you have to get used to.
The definition of the surface features are enhanced going from 0.7A to 0.5A with the double stack; not so much the proms - they're OK with the single stack 0.7A
I've used the Coronado SM60 filters single and double stacked on an ED80 for many years.
Which camera do you intend using?
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