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This weekly course covers the most common questions videographers encounter when shooting and editing with DSLR cameras, from choosing a frame size and frame rate to understanding moiré. Authors Rich Harrington and Robbie Carman will also help you understand the impacts of compression and the difference between cropped (or micro 4/3rds) and full-sized sensors in cameras, and much more. This continual FAQ guide is a handy way to find the answers to the questions that plague you the most.
Jim Ball: The ISO is basically an exposure index for digital cameras these days that simulates the ISO sensitivity rating of film, but in the digital realm. So these days, digital cameras have far surpassed sensitivity, ISO sensitivity, than film cameras ever could. They can go up to 20, 30,000 ISO, which is very light sensitive. So its a very good tool, for shooting in available light. Which, asthetically speaking helps you to simulate reality with minimal effort.
If you can just shoot with what's there and augment, that ISO adjustment and the capability for high ISO ratings is very handy. Since a lot of these cameras are also still cameras, I can do a very, good, I can make very good tests with still images and, and process them on my laptop. And there are two things that mostly I care about with, playing around with ISO, which is contrast range. Some cameras, the contrast range and the dynamic range the distance from normal exposure in a grey card to highlights or shadow areas changes with your ISO settings.
It's not just sensitivity, it's also that, that distance between highlights and shadow. And, and your 18% gray rating. So I'll check to make sure an ISO rating is acceptable to me for preserving highlights or for preserving shadow areas. The second thing is noise. With any new camera or any new DSLR camera or video camera, I want to make sure I know what the maximum ISO rating, ISO sensitivity is in the camera that's still produces acceptable blacks with minimal noise on a decent size monitor, not just in a little LCD in a camera.
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