I’m in a photo 1 class and talking about the program mode and flexible programming is confusing. If changing one setting changes the others to meet it, how is anything changing?
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If you’re in a class you’re already paying for the instructor, so asking them should be higher on your list of ways to get an answer.
Background reading: [Exposure triangle](https://www.bhphotovideo.com/explora/photography/tips-and-solutions/understanding-exposure-part-1-the-exposure-triangle) and [program mode](https://digital-photography-school.com/understanding-program-mode-on-your-camera/)
Three variables contribute to the total exposure. If you increase one than one or both of the others decrease to keep the total. Aperture affects how thick of a slice is in focus (depth of field). Shutter speed affects how long the exposure is in time (motion blur or freezing). ISO or sensitivity controls how much final arises from the light input. A higher ISO can make a bright-enough image with less light, at the expense of more noise.
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