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Old 09-05-2012, 04:39 PM
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Merlin66 (Ken)
Spectroscopy Wizard

Merlin66 is offline
Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 7,923
In the 450D there are two filter elements:
The colour balance filter (this is the one usually removed to improve the Ha response for astroimaging) then there's the front anti alias/ dust shake filter - this is infact a UV-IR cut filter (400nm-700nm).
If you only intend using the body for astro then removing the colour balance filter is the way to go.
You don't need to replace it unless you want precise focus with standard camera lenses.
I removed both filter elements from my 1000D for spectroscopy and now have access from 380nm to NIR.
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