Must Photos Always Be Rectangular?
Print Sizes and Their History
When you look at some of the most common sizes — and the proportional aspect ratios that match them — you’ll find that most of these sizes originate with a historic camera type that used film of that size. Take, for instance, the popular 8x10 size. This size comes from the old large format cameras, such as one of the camera sizes that Ansel Adams would have used, which used film that came in 4x5-inch sheets. One popular large format 4x5 camera was the Graflex Speed Graphic. From those cameras, we got the 4x5, 8x10, 12x15 and 16x20 print sizes. All of the larger measurements are simply larger aspect ratios of those 4x5-inch sheets of film.
The 5x7 aspect ratio came into being this same way, starting with cameras like the Rochester Optical Co. Universal Camera, which was a 5x7 folding view camera that was first introduced in 1890. At the small size, you’ll find this format as 2-1/2x3-1/2-inch prints, while at the larger size, you’ll find 10x14 and 20x28. This aspect ratio comes another type of large format camera, such as the cameras used for documentation by the National Park Service. Like 4x5 or even 8x10 large format cameras, these used sheet film, but film that measured 5x7 inches.
Later, with the advent of 35mm cameras, the 2x3 size started to become more popular. Among first 35mm cameras available to consumers was the Tourist Multiple in 1913. This size is an old one, but nowadays, this is the aspect ratio that most modern DSLRs use, giving you 4x6, 6x9, 8x12, 10x15 print sizes and up.
The bottom line is, for almost every print size that you can choose, it has a historic basis in a camera that made use of and popularized the aspect ratio.
Are There Other Reasons Why Rectangular Prints Are Standard?
One reason that prints are usually rectangular, or at the very least, square, could very well be because compositional rules are often designed to work better with the rectangle. Think about the Rule of Thirds for a moment. How would you apply it to a triangle, or a circle?
Circular designs, in particular, tend to feel more normal and easy to understand when the subject material is centered, but as photographers, we are taught to avoid centering our subjects unless the image really calls for it. Consequently, you really only see round or oval images in portraiture, and even then, usually among older portraits and not modern works.
So are these the reasons why images tend to be rectangular? Certainly older film formats played a larger role in deciding print sizes, but perhaps the reason we don’t stray from those old print sizes has to do with compositional difficulties.
Another issue may simply be ease. Today, with all of our technology, it is still easier to cut prints with nice, straight edges, and it is still easier to make a square picture frame than it is to mold wood into a round or oval shape. In the digital age, everything, from our phones and computer monitors, to televisions, billboards and digital picture frames, is rectangular. What better way to fill a screen than to use an image that is a similar shape to that screen? It is simply easier to make and display a rectangle than it is to do any other shape.
Should We Hesitate to Make Unusual Shapes?
As with any other rule of art, the answer to that question is maybe, and maybe not. Certainly, the rectangular shape is popular for all of the reasons I have listed and then some. But, perhaps it is time to bend the rules a bit.
We already see this happening with some image types. Panoramas, for instance, are becoming more popular, and even though they are rectangular, they are longer and narrower by far than any of the more common aspect ratios. Square imagery is another option, one that allows you to delve into the idea of centric photography without creating circles.
Then, you have the idea of multiple shapes. Diptychs and triptychs, for instance, are also still mostly rectangular. However, in designing these, you have the option to use rectangles of differing proportions.
But what about the more unusual shapes? Circles, ovals, triangles, even trapezoids. Is there value to these shapes, artistically or practically? The only way to find out is to experiment.
I tend to believe that in most instances, unusual shapes are likely to make the subject material feel constrained, or “boxed in” simply because we are used to seeing the edges of the image that you will end up cropping out to make your new shape. I also think, however, that this could prove to be an interesting challenge to the rules of composition. Perhaps even a way to develop new rules, or add to rules that haven’t changed in centuries.
Throughout history, it has mostly been the photographers who are willing to challenge the rules of composition that are able to make something new and revolutionary. So, perhaps this idea is one worth a little more thought. And, for those of you bold enough to break the rules, perhaps it is an idea worthy of experimentation!
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