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Great results from these filters so far.. the ND 16 works in bright californian sun (i'm filming in the central valley too.. i mean bright!) - am able to stay at 100 ISO and 1/60th shutter and have correct exposure.
ND 8 works at dusk.. between these filters I am well covered..
I think the polarising aspect of them blocks some extra light which is why they work even at a lower ND value than some other filters available - I brought a set from a different supplier that go up to ND 64 but I haven't even tried them out yet because Im happy with these!
ND value is marked on the filter and polariser can be rotated with handy 'top' arrow.
Well made, solid and works very good. The only con it's the slight vignette in the borders of the image. Otherwise it's a great quality lens filter for DJI Osmo.