Long Exposure Variable ND Filters Table – For Variable ND Filter (ND2 – ND400)


f/stop Reduction
(ND Filter Factor) vs.
Base Shutter Speed
-1 f/Stop
(ND2)
First Arrow
-2 f/stop
(ND4)
1st dot
-3 f/stop
(ND8)
2nd dot
-4 f/stop
(ND15)
3rd dot
-5 f/stop
(ND30)
4th dot
-6 f/stop
(ND60)
5st dot
-7 f/stop
(ND125)
6st dot
-8 f/stop
(ND250)
Last Arrow
~-8+f/stop
(ND400)
Max
Reduction of Light to:
Slow Shutter Speed to:
1/2
1/4
1/8
1/16
1/32
1/64
1/125
1/256
~1/410
Triangles & Dots
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¥
“Max”
1/8000s
1/4000s
1/2000s
1/1000s
1/500s
1/250s
1/125s
1/60s
1/30s
~1/48s
1/4000s
1/2000s
1/1000s
1/500s
1/250s
1/125s
1/60s
1/30s
1/15s
~1/24s
1/2000s
1/1000s
1/500s
1/250s
1/125s
1/60s
1/30s
1/15s
1/8s
~1/13s
1/1000s
1/500s
1/250s
1/125s
1/60s
1/30s
1/15s
1/8s
1/4s
~1/6s
1/500s
1/250s
1/125s
1/60s
1/30s
1/15s
1/8s
1/4s
1/2s
~1/3s
1/250s
1/125s
1/60s
1/30s
1/15s
1/8s
1/4s
1/2s
1s
~1.6s
1/125s
1/60s
1/30s
1/15s
1/8s
1/4s
1/2s
1s
2s
~3.2s
1/60s
1/30s
1/15s
1/8s
1/4s
1/2s
1s
2s
4s
~6.4s
1/30s
1/15s
1/8s
1/4s
1/2s
1s
2s
4s
8s
~13s
1/15s
1/8s
1/4s
1/2s
1s
2s
4s
8s
15s
~24s
1/8s
1/4s
1/2s
1s
2s
4s
8s
15s
30s
~48s
1/4s
1/2s
1s
2s
4s
8s
15s
30s
1m
~1.6m
1/2s
1s
2s
4s
8s
15s
30s
1m
2m
~3.2m
1s
2s
4s
8s
15s
30s
1m
2m
4m
~6.4m
2s
4s
8s
15s
30s
1m
2m
4m
8m
~13m
4s
8s
15s
30s
1m
2m
4m
8m
15m
~48m
8s
15s
30s
1m
2m
4m
8m
15m
30m
~48m

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