I am reading Bryan Peterson's book Understanding Exposure. Quoting text from the book:
I set up my camera and 75-300mm lens on a tripod. I set my focal length to 130mm and aperture to f/32 and focused a third of the way into the scene. With my camera pointed upward to the green leaves, I adjusted the shutter speed until a -2/3 exposure was indicated - 1/25 sec. I then recomposed to get the scene here and fired off several frames.
I have a couple of questions based on this.
- What does he mean by -2/3 exposure and why is that required? There is a discussion about this in the book. But I can't understand it fully from the book.
- Most of the shots which he explains in this book were taken by recomposing the scene. I am not understanding the concept behind recomposing. Why is that required? And how can I decide whether to recompose a scene or not?
I have a Canon 500D with the 18-55mm kit.