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Forum: Pentax SLR Lens Discussion 09-08-2018, 09:46 PM  
Using ND filters
Posted By nobody
Replies: 15
Views: 1,893
There is a simple way to determine exposure while using ND filters. Just multiply exposure time w/o filter by ND value of filter eg if you have ND8 (ND32, ND100, ND400) multiply exposure by 8 (and respectively by 32, 100 or 400).
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