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Which filter
I have a full spectrum canon500d, plus an Astronomiks clip-in UV/IR filter.
So I want to add to my filter range to get more detail; what would give me more scope to move with:
a) 3nm H-Alpha
b) 7nm H-Alpha or
c) 12nm H-Alpha
Also is there any advantage in imaging with more than one filter attached?
Keep in mind that i am photographing from very dark location with
Cheers
Carl
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