Issue link: https://takingitglobal.uberflip.com/i/1350781
S A R A C O R N T H W A I T E 86 whether fast or slow, controls how much time the light hits your sensor. If you're filming somewhere really, really bright, you want a fast shutter speed because you don't need a lot of light. If the shutter is open too long, your photo will become overexposed. If the place you are filming is really dark, the opposite is true. If you want to capture something fleeting, like droplets in the air, fast shutter speed is important so the image isn't just a blur. Night exposure uses a slow shutter speed, where the shutter is open anywhere from 10 seconds to 30 seconds. The light from the star needs enough time to embed on your sensor and for your sensor to recognize it. Iso is a digital way to boost the light in an image. A high Iso makes photos grainy. A pro might look for an iso of 50-100, but 200-400 can also be really effective. Photos have so much digital information and you can manipulate every pixel. You will see more digital noise in video faster if you boost it. In certain situations, you won't have a choice but to increase the iso, like in documentary settings.