- One million seconds ≈ 12 days
- One billion seconds ≈ 31 years
Great Baseball Cap From Poten
This is my favourite cap (and headgear in general) of all time. And this is also a good example of something I love in general: Simple products, made extremely well.
These caps are made at the same factroy that does caps for the Japanese baseball league. Several brands have tried to get the factory to produce caps from them, but without success. According to Self Edge, Hiro (the man behind Poten, who also has a huge baseball card collection) had to visit the factory several times, over three years, to show them that he cares enough about baseball to have them produce caps for him. Lucky for those of us who don’t play in the NPB! But what’s so good about these caps then?
Why 4k ≠ 5k
And what Apple means when they say «Retina»
I’m pretty sure the Apple Studio Display is overpriced. Still, the discourse after its announcement has been plagued by people not quite understanding the difference between 4k and 5k on a 27-inch display. It’s just one kay difference — why can’t you just buy a 4k screen that’s cheaper, brighter and/or has a higher refresh rate? Why do some Apple fans crave this extra kay so much??
Marc Edwards, of Bjango, wrote an excellent piece on this, and I especially like the visual examples of 4k vs. 5k on macOS. As a maths teacher, I find this problem interesting, and in this article I will bring some light to this issue the way I would to a high school class. Perhaps this makes it easier to understand why the issues Edwards highlight appear.
What’s in a kay?
To narrow things down, I’m just going to look at 27-inch screens with a 16:9 aspect ratio (so no super-wides here!). Let’s compare the three most normal resolutions at this size: 1440p, 4k and 5k.
Humans are notoriously bad at comparing large numbers. Every day, there’s a new tweet trying to help us understand the difference between a million and a billion, by reminding us that:
So, it’s forgiven that people think 4k and 5k are pretty close. However, 5k resolution has a lot more pixels:
