Quote:
Originally Posted by JA
The L Filter (Luminance filter) transmits light across a 300 nm band (~400 to 700nm) so will show up deficiencies in optics and in different focus points for differing wavelengths (colours) far more readily than a typical narrowband filter with a 3, 5 or 6 nm 50% bandwidth.
Best
JA
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I still don't understand this point, so using a mono, L filter will give a mono result, where will be the problem then?
And what about those various LP filters nowadays that cut some of visible lights in between? I mean are those not good enough to be used instead of L filter let's say under LP skies? and if so then are those filters with achro scope isn't enough to cut something or produce good enough IR-UV cut result?