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Which CLS filter
I’m looking at using a CLS-type filter in conjunction with my NB filters. But I hesitate because I can’t convince myself that they would achieve anything much. My NB filters are Astrodon 5nm but despite that my images seem to have a slight haze that I put down to stray urban light fogging things up.
And so I wonder whether a CLS would help. The various manufacturers seem to offer a basically similar specification with the main bands being in the 400-550 nm and 600-700nm more or less taking in OIII(500.7), Ha (656.3) and SII (671.6). In theory though, my NB filters ought to be enough without a CLS which would only duplicate (at best) what they already do. But the fog persists.
Happy to be put straight.
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