>>8208410IDK how much freedom Opencamera gives you to actually change these settings, smartphones tend to keep their cameras pretty locked down, but as a general photography principle, you are always balancing three elements:
1. Shutter speed. A fast shutter speed means you won't get blurry pics cause the photo was taken quickly, but the faster you go, the darker your photo gets.
2. Aperture, or how wide the lens opens. This is also known as f-stop. A small value like (1.8) means the lens is wide open, and is letting in a lot of light, but the field of focus becomes very shallow so it can be hard to get your entire scene or figure in focus all at once. A large value again means your photo becomes dark, because the lens is barely open. Aperture can be changed freely, but lenses are generally identified by their lowest possible number and can go no lower than that. Low-aperture lenses like 1.Xs tend to be expensive.
3. ISO. The higher the number, the brighter your picture gets, but it also gets grainier. You want to aim for the lowest ISO possible.
So as you can see, it's like a math equation, or a brain teaser. You're juggling these elements to try to get them all in the most ideal place possible. Luckily, there are external solutions to help them along, like for instance you can use a tripod, which will stablize shots and let you use lower shutter speeds, or add more lighting, which will really affect all three settings.
