So... I will tell my brain to shut up and read the lessons again today and attempt a lab. Not a Lab, but a lab.
If you’ve already read through it once and watched the videos, skip straight to the lab. You don’t have to understand it all immediately, the important thing is getting out there with your camera and seeing how the settings affect what happens to the photo. You can go back afterwards and read the lectures at your leisure, and once you have more practical experience, the words will make more sense. There is no exam
The CliffNotes are:
1. The aperture of the lens works like the pupil of your eye, letting in more light when it’s bigger and less when it’s smaller.
2. When the aperture is wider, there is less depth to what is in focus (ie if your dog is standing looking at you then at a narrow aperture you may have the whole dog in focus, tip to tail, but with a wide aperture the eyes may be in focus but the nose, ears, and everything else is blurry)... this is the point that needs the practical work to internalise it.
3. The bit that people (including me when I started out) can get muddled over is that as the “number” gets bigger, the aperture itself (the hole) gets smaller. So f/1.4 is wiiiiide open, like a cat who just saw a cucumber, and f/22 is teeny tiny, like someone staring into the sun. Again, it’s confounding to start with but just write it down if you need to and then the more you use it, the more this becomes second nature and you won’t even need to think about it.