Lens Filters Polarising filter on your lens? Compensate for f-stop exposure! Understand about compensating for f-stop exposure when using a polarising filter. Urth HQ | Australia Christian G2019-12-03T05:56:02+00:00Categories: Lens Filters|Tags: how much polarised light you block out, maximum polarision effect, polarisation effect, polarising filter, polarising filter blocks|