Thread: Filter Offsets: Astronomik Deep Sky vs Type 2
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Old 19-01-2019, 02:29 PM
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Merlin66 (Ken)
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Peter,
I can't seem to find any Chromatic data for the TEC 180
You mention "Worst case by design for my TEC180FL should be 60 microns"
can you clarify?

Using a spectrograph on any/ all your filters will quickly confirm any leakage.
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