Knorp
Well-known member
Anyone ever experienced this with (C)PL filters ?
TIA
Text from the Marumi website ...About deterioration
A PL filter will deteriorate due to its structure. PL filters, if degraded, will become reddish, instead of an original grey color. It is recommended that a new PL filter be purchased every 4 to 5 years if you are serious about your work.
TIA