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Old 30-08-2009, 08:44 PM
Ian Robinson
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Ian Robinson is offline
 
Join Date: Jan 2007
Location: Gateshead
Posts: 2,205
Look at Lumicon filters .... they are dammed good.

You need to compare the filter transmission curves (amount of light passed with wavelength) and know what wavelengths of light pollution are being attenuated.

Go for 2" filters rather than 1.25" filters if you can , for obvious practical viewing and imaging reasons.
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