Polar Pro ND/PL which one when??

[OneSunnyDay]

I have the new cinema series Polar Pro Filters and this is totally N00b question (Sorry!), but how to a work out which stop I need to use? I.e If i want the shutter speed to be 60, and in auto its recommending 1/500th, how do I work out with ND i will need?

and on the PL, does anyone know if the markings needs to be vertical or horiztonal relative to the horizon for the PL to function?

Sorry again for the N00b questions!

 

[dirkclod]

Not sure but this thread might help you till someone chimes in .PolarPro Cinema Series filters

 

[Ron Armour]

For me I use a ND16 in very bright conditions.....that gives me a speed of 60 when shooting 30 fps.
ND8 for cloudy bright and a polarizer in overcast conditions. You can rotate the polarizer (1 1/2 stops) to fine tune the speed.