David Mullen ASC
Moderator
PART 1: How would you shoot a forest scene with high contrast? There would be very dark parts and some bright bright highlights. The subject is the lush green forest and you can shoot anytime of day you wish.
What ISO would you choose, what lens choice would you make and assuming you'd use tracking/dolly and/or jib arm/crane for motion, what shutter speed would you use and is there a shutter speed you'd never go under/over? What would you look for in your histogram?
What changes would you make if you were following a character being chased/chasing?
PART 2: Same question but with a meadow instead of a forest?
Thank you again for all your advice and for being so generous with your time,
A bright daytime forest can both challenge shadows and highlights, so it's probably safest to stick to a "normal" rating that is not biased one way or the other, i.e. 250 to 320 ASA on the RED. Unless the forest simply is too dark and dim for those ratings, but generally then you aren't dealing with much harsh sunlight.
But you're talking about one of the worst-case scenarios for a digital camera, any camera. Look at "Che", which had some exposure problems in the jungle, where the exposure was sort of split between sun and shade (the generally best approach) but sometimes an actor managed to stop and stand under the hottest patch of sunlight around, and the sensor simply was overloaded and clipped. So obviously one trick is to avoid that situation by controlling where your actor steps (hard to do in a gritty, semi-documentary war movie like "Che" I know), keeping them in the areas of the forest that are exposed correctly. You can (sometimes) also fly small flags or nets or silks or camo-net or leafy branches over the actor to cover a patch of sun. And you can white cards, bedsheets on the ground, etc. to bounce sun into the shadows a little. And perhaps a contrast-lowering filter would help slightly, like a DigiCon or UltraCon. Otherwise, it's more a matter of making shot by shot decisions as to the best place to set the exposure.
Even before digital cameras in movies, cinematographers struggled with forest and jungle scenes, which is why lower-contrast film stocks like Agfa negative were popular in some movies like "Out of Africa", "Gorillas in the Mist", "Mountains of the Moon", etc.
Some movies use haze / smoke drifting through the woods to soften some of the contrast too, though that can create other problems.
What shutter speed you'd use just depends on the look you want the motion to have -- if you want that streaky somewhat video-ish smear that some of "Apocalypto" had, you use a 360 degree shutter, if you wanted that strobey, stacatto motion that "Gladiator" and "Saving Private Ryan" had, you use a 45 degree shutter, and if you wanted normal motion blur, you use a 180 degree shutter.