Okay kiddo, imagine you love taking pictures with your camera. Sometimes, you might take a picture that doesn't look quite as clear as you want it to. That's because the light going into your camera has to be just right in order to make a really good picture.
Well, back in the olden days, when cameras were just starting to become popular, there was a group of photographers who wanted to make sure that their pictures were always super clear and sharp. They called themselves Group f/64, or just f/64 for short.
The name f/64 actually comes from something called the "aperture" on a camera. The aperture is basically a hole in the camera that lets in light. The f-number is a way of measuring how big that hole is. When the aperture is set to f/64, it means the hole is very, very tiny, which lets in very little light.
Why would anyone want to let in very little light? Well, it turns out that when the aperture is very small, it makes everything in the picture look super sharp and clear, because it's all in focus at the same time. That's what the members of f/64 wanted – pictures that were perfectly focused and sharp.
The group included some famous photographers, like Ansel Adams and Edward Weston, and they all shared the same idea that photography should be a form of art, not just a way to take pictures. They wanted to show the world how beautiful and amazing the world around us can be, if we just look at it in the right way.
So, in short, Group f/64 was a group of photographers who wanted to make sure that their pictures were always super clear and focused. They did this by using a very small aperture on their cameras, which let in very little light but made everything in the picture look sharp and beautiful.