how do i calculate exposures when i’m using a Big stopper?

how do i calculate exposures when i’m using a Big stopper?

how do i calculate exposures when i’m using a Big stopper? Make the Maths easy! Lee Filters’ Big Stopper comes with a guide to help you out, but if you don’t have yours or you’re using a different 10-stop ND filter, you can work out the ex...

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