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Old 26-12-2011, 09:07 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
if your going to modify the camera for astro use only.....you don't need to replace the filter with a Baader!!!
Removing the internal Canon colour balancing filter still leaves the front anti-alias/ dust filter which has exactly the same UV-IR cut-off as the Baader.....
I have some spectroscopic data to verify this, but few seem to be aware...
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