How strong ND filter for filming in sunlight?

Started Jun 17, 2012 | Discussions thread
Spooner
Contributing MemberPosts: 566
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Re: How strong ND filter for filming in sunlight?
In reply to Sailor Blue, Jun 20, 2012

Sailor Blue wrote:

Use the sunny 16 rule as a guide. The rule says that in the summer at North American/Europe average latitudes you would use 1/100 sec and f/16 in 10 am/2 pm sunlight.

1/100 sec -> 1/50 sec = 1 stop.

f/16 -> f/11 -> f/8 -> f/5.6 = 3 stops.

If you want to shoot at f/5.6 at 1/50 sec you would need a 4 stop ND filter.

I know YOU know it, but just to clarify one point you forgot to include about the Sunny 16 rule. "Set the shutter speed to 1 over ISO" So you are assuming an ISO of 100.

For anyone who doesn't know the rule.

John

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