The golden ratio (or golden mean, or golden section, or divine proportion, or whatever you want to call it) is the subject of heated debate among photographers. But if you love using the golden ratio when you shoot, you should definitely check out this creative little pocket-sized card.
There are a lot of debates in the world of photography: Nikon Vs. Canon, DSLR Vs. Mirrorless and Full-Frame Vs. Everything Else just to name a few. But one of the battles that doesn't get as much air time probably has more impact on your images than any of the previous three. We're talking about The Rule of Thirds Vs. The Golden Ratio.
Composition and the rules that accompany it are some of the most basic aspects you learn when first picking up a camera. If you've been a photographer long, it's probably safe to say that the "rule of thirds" and "golden mean" are ingrained into your brain so well that it's second-nature now.
That being said, every once in a while it's nice to take a fresh look at the rules and the underlying concepts behind them -- if for no other reason than because you have to know the rules in order to break them properly.