Architect1776 wrote:
Why are photos all cropped to some arbitrary XY dimension?
I was in the Smithsonian and I do not recall the paintings all being the same arbitrary dimensions.
What makes photographers believe that they must live in arbitrarily determined sets of dimensions?
Should the image determine the XY dimensions?
Or are we going to jail if we don't follow certain XY dimensions in our creations?
Why are most mechanical parts made to size specifications?
Why are sports played on standardized court or field sizes?
Why can't we just have commercial chaos?
I worked in a photo lab for years. We used tens of millions of dollars' worth of automated printing equipment that was precision engineered to make certain size prints from certain size negatives. If you wanted to make a different size, it was going to be a VERY expensive change!
Our paper came in master rolls 40" wide by 5600' long. We had a slitting darkroom where it was divided into rolls:
35mm x 500'
46mm x 500'
70mm x 500'
2.5" x 500'
4" x 500'
5" x 500'
8" x 500'
10" x 500'
11" x 500'
12" x 500'
16" x 500'
Each of these rolls fit a specific optical printer that made specific products. Digital technology changed that, but we still kept to standard sizes for many reasons.
When we switched to digital mini-labs, we only needed 4", 5", 8", 10", 12", and 20" rolls of silver halide paper. Inkjet printers were used for all prints bigger than 20" wide. The lab software let us make any size we wanted, but the frame market kept us to standard sizes. Not many folks want to buy odd-sized frames at a custom framing shop. They're expensive!
In my own work, I've not found many image compositions that required a print outside the aspect ratios of:
1:1 square (6x6 cm size 120 film, 4x4 size 127 film, and 8x8, 10x10, 12x12, 20x20... print sizes)
5:4 (4x5, 8x10, 16x20, 32x40... prints)
4:3 (medium format digital, 6x4.5cm film, size 126 film, Micro 4/3, most smaller sensors and 3x4, 6x8, 9x12, etc. prints)
3:2 (35mm/full frame/APS-C, 4x6, 6x9, 8x12, 10x15, 12x18, etc.)
16:9 (HD video, recent smartphones)
The capture format requiring the least amount of cropping is 4:3. The capture formats most likely to require cropping are 1:1 and 3:2. The format most difficult to use for vertical compositions is 16:9 (vertical cell phone videos look really stupid — to me, anyway).