Base Exposure without Filters	3-Stop ND Filter	10-Stop ND Filter
1/8000	1/1000	1/8
1/4000	1/500	1/4
1/2000	1/250	1/2
1/1000	1/125	1
1/500	1/60	2
1/250	1/30	4
1/125	1/15	8
1/60	1/8	15
1/30	1/4	30
1/15	1/2	60 (1 min)
1/8	1	120 (2 min)
1/4	2	240 (4 min)
1/2	4	480 (8 min)
1	8	900 (15 min)
2	15	1800 (30 min)
4	30	3600 (1 hr)
8	60 (1 min)	7200 (2 hrs)
15	120 (2 min)	14400 (4 hrs)
30	240 (4 min)	28800 (8 hrs)
1 min	480 (8 min)	57600 (16 hrs)
Created for you by Ilya Genkin Photography