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Old 09-05-2012, 07:11 AM
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gregbradley
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Join Date: Feb 2006
Location: Sydney
Posts: 16,411
I would double check your data about simply removing the UV/IR filter.

My understanding is the filter needs to be replaced with one of various options but the key thing is same thickness glass in the replacement otherwise autofocus will no longer work.

Astrodon, Baader sell replacement UV/IR filters with Astrodon promo showing theirs may be more advanced.

Other option is to replace it with Edmunds Optics clear glass with antireflection coatings.

Then you need an external UV/IR filter on your lenses to work in the day.

Greg.
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