WOW, Up to 11 stops of ND might be needed

[Moses Chisel]

Just been doing the math on this and if you take the sunny F16 rule as a baseline, then on a sunny F16 day, using the camera's base ISO

You need 4 stops of ND to shoot F16, 1/50s @ ISO 800 ;

You need 6 stops of ND to shoot F8, 1/50s @ ISO 800 :

You need 8 stops of ND to shoot F4, 1/50s @ ISO 800 :

You need 11 stops of ND to shoot F1,4, 1/50s @ ISO 800

I hear the new Wratton2 NDs are more rigid/stiff than the older ones but still 0.1mm thick, can anyone confirm this?

Surely 11 stops ND may have an effect on IQ?

[Ryan Patrick O'Hara]

I'm a bit confused on your baseline...

f16 is with what? 50iso/asa?

I'm not sure you really need to close down that much, say, unless you were shooting in light sand, or entirely white snow.

11 stops of ND WILL have an effect on IR contamination, probably for those cameras that even protect against it. I'd recommend at least one GOOD IR cut filter. Some are garbage.

You'd be best to not shoot wide open unless the story and style calls for it. Close down to a T/4 or T/5.6 at least. Also, you'll probably be using a pola, which can take about two stops off as well, depending.

I'd probably sit at a T/5.6, ND Hot Mirror 1.2, and Pola. Not to mention curb the ISO down a small amount. Some camera's, react well to curbing down ISO, some don't. It really depends where their baseline is and how they handle the signal adjustment. I'd say the RedOne would handle it decently but I'd have doubts about the F3... I'd have to test it, I've not used the F3 in harsh daylight yet.

[Moses Chisel]

The sunny F16 rule for base iso with this camera is

F16 ; 1/800s @iso 800

thats why you need 4 stops just to get the speed at 1/50s at F16,

which is nuts

[Osslund]

I have a 10 stop ND thats for extrem situations and it's about black as black can be. I might give it à try on my AF101...

[Andrew Stone]

As usual Ryan, good advice on a number of levels.