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Choosing filters
I'm having a look at the NB filters I'm using and considering some changes/improvements. Doing the usual reading has not made the decision easier - rather the opposite.
I'm reading, for example, that as between Astrodon and SBIG, there has been a fair amount of strong lanugage including the suggestion that the SBIG line of filters are only suitable for fast scopes whereas Astrodon are better on slower. But I have no idea why. Also, it seems that some recommend using IR/UV cut filters in addition to the usual NB range. Also, it seems that bandwidth (the +/- on either side of the centre-line) is a significant factor.
I wonder if anyone could demystify the choice of filters for me. I am using what would probably be regarded as a 'slow' system with ratios of 6.3, 6.7 and 11.
Peter
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