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Technically, you should not, since darks are just that,
images with no light. The filter would have nothing to do
with it, since it is covered during a dark frame. I would
give it a try first without (taking one as a contigency
anyhow), and only reshoot the library if needed. As long
as the imaging chip and electronics have not changed, the
dark frames should be the same afterwards as before.

Tom

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