As background: The Golden Ratio, also called phi, or Φ is the ratio of length to width of 1 to 1.6180339887… It can be algebraically expressed as x/1=(x+1)/x or x²-x-1=0 or 1+√5)/2.
So, we're talking, in essence, about any rectangle with the very specific height / width ratio of 1/1.6180339887… (Often expressed as 1.618.)
Here's a close proximation of the "true" Golden Ratio. I say "close", because, of course, we're limited with pixel size and scaling to something that works on the forum.
From here, we can superimpose the Golden Spiral which is not a true logarithmic spiral, but closely approximates to the Fibonacci spiral.
Next, we can mirror that over, and we get this:
And, from that, we can also take the main divisions, and get to an approximation of a "Golden Ratio inspired" "Rule of Thirds".
1.618. is an incommensurable number, which means it is an irrational number, which is why it’s shown with the dot or dots after the number. This means that, no matter to how many decimal places you calculated the number, you’ll never reach a finite number. Here it is, calculated to many more places:
1·618033988749894848204586834365638117720309179805762862135448622705260462818902449707207204189391137484754088075386891752126633862223536931793180.
Anyway, it so happens that, since time immemorial, the Golden Ratio has fascinated artists, mathematicians and Architects. Euclid wrote about it 2000 years ago, in his Elements; Leonardo Fibonacci, in 1202 CE in his book, Liber abaci, and in 1509 CE Luca Pacioli wrote at length about the number, although largely copying earlier writings by others. Phi went on to fascinate Leonardo de Vinci, Michelangelo and later Le Corbusier.
Of late, I've seen several photography webpages and blogs writing about it, and, they mostly get it wrong.
Without raining on anyone specific's parade, here's a few examples:
Why The Golden Ratio Is Better Than The Rule Of Thirds | PetaPixel Petapixel gets it spectacularly wrong as none of their images are cropped to the Golden Ratio.
The Golden Ratio in Photography: A Comprehensive Guide likewise completely mucks it up.
https://photographyhero.com/golden-ratio-photography/ starts off well and explains things well, and then goes off the rails.
https://www.apogeephoto.com/how-to-use-the-golden-ratio-to-improve-your-photography/ mucks it up badly.
https://expertphotography.com/golden-ratio-photography/ gets more things right than most, but then hammers home on the golden spiral like most everyone else.
Using the Golden Ratio in Photography - Focus Camera is almost like Expert Photography but likewise loses the plot on the spiral. But, they do raise an interesting point with regard to the Fibonacci spiral - more about that below.
https://www.phototraces.com/golden-ratio-in-photography/ is more of the same, perhaps with slightly fewer errors. I almost got excited because their text does a good job but then, surprise surprise, they muck it up with the image examples.
So, to spare you all the deeper delving (unless you want to of course!) here's the take-out:
Most sites seem to fixate on the Golden Ratio spiral. After that, some sites appear to see merit in using the Golden Ratio as a revised "rule of thirds" grid.
But, the key problem I see is that they
ALL ignore the basic premise of 1.618.
So, about the spiral: The Golden Ratio spiral is not, of course, a true logarithmic spiral as is found in nature. It's very close to the Fibonacci spiral, predominantly because Fibonacci's work closely relates to (and works around the) Golden Ratio. Peculiarly, not only do most of sites draw the Golden Ratio incorrectly, but some of them completely distort the spiral.
I include some overlays to show what I mean. (All taken from the sites mentioned above.)
No attempt to follow the true Golden Ratio:
Likewise:
Close, but no cigar:
Another complete stretch:
Likewise:
And, lastly, the image that looked "off" to me and prompted this whole investigation.
I think, if a photographer is going to attempt to work to the Golden Ratio, then as a first principle, they need to get the proportion of the image right. After that, the main divisions can be used, but the better way to do it would be to evaluate the sizes of the main elements in the image and look at the relationship in size between those main elements in terms of the Golden Ratio. I think the spiral is misleading at best and very possibly of minor importance in the scope of scale and proportion. The spiral is, after all, simply the result of overlaying ever decreasing groups of the Golden Ratio. The spiral is not the Ratio and not the proportion relationship. And, it bears no resemblance to the logarithmic spiral seen in nature.
Lastly, here's some of the worst examples I've found:
https://www.lifepixel.com/photo-tutorials/what-is-the-golden-spiral-and-how-to-use-it https://cameraharmony.com/what-is-the-golden-ratio-and-how-to-use-it-to-your-advantage/ https://medium.com/billeasy-artists/designing-golden-ration-style-25be3178e604 https://blog.hubspot.com/marketing/golden-ratio
Last edited by MarkJerling; 09-05-2022 at 08:44 PM.
Reason: More added.