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IDAS 48mm Light Pollution Suppression Filter
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17-09-2007, 02:58 PM
avandonk
avandonk
Join Date: Aug 2005
Location: Melbourne
Posts: 4,786
As they are a type of interference filter ie dichroic and not absorption they fail at really high at wide fields and attenuate and discolour the extremities.
The 58mm LPS filter is fne down to 50mm focal length
Bert
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