Shooting ext day and filtering

[Marco Graziaplena]

Hi
when I shot ext day I use polarizer and nd to set the iso to more or less 20 asa. Sometimes I add a UV in case of backlight and flare, to lower the red color. This means you often got 3 filters in front of the lens. I'd rather avoid lowering iso on the camera to bypass the problem. I never tried changing shutter speed cause I'm afraid of the result...
Any suggestion

 

[Martin Weiss]

Maybe I misunderstood your question, but why would you set the ASA to 20? That sounds very low. I'd use a heavy ND with a hot mirror. A polarizer on top should give you an extra 2 or 2 1/2 stops of filtration. If you do not need the polarizer for effect, you could get a even stronger ND filter.

If your subject does not have lots of movement (for example landscape), you will also get good results with a small shutter angle. Have done it many times when there was no ND at hand. As always: test to see what pleases you.

 

[Marco Graziaplena]

Hi Martin
I set my lightmeter to 20 (more or less it depends on conditions) to have a t stop around 5.6 leaving 320 iso on the camera

 

[Ryan Sims]

20 What?

20 What?

set the iso to more or less 20 asa....

Okay, ISO and ASA are the same. The camera's ISO/ASA setting is 320. What is 20 on the light meter? Shouldn't it be 320 as well.

 

[Cail Young]

He's doing filter factor on the meter by setting it to 4 stops (if my maths is right) under the camera's rating. If you've got ND1.2 in the mattebox, then it makes perfect sense.