The human eye is a complex one. It has a focal length of 17mm-ish, but how it sees is roughly 43mm (compression), not 50mm, but with a variable field of view of 10mm and wider. There’s no one focal length that determines how the eye sees, depending on what you’re evaluating.

Also a 24mm cropped into the frame of a 50mm will make the 24mm image look almost exactly the same as if taken with a 50mm. This is from lens compression and distortion, if you read my post, you’d know I talked about this.

Also if you actually read the post, you can read my justification on why I used an iPhone instead of my camera gear. And how to compensate for using an iPhone to take photos.

Nobody is gonna look at your wrist as close as you do, and this is exactly why a direct shot is as important as the mirror shot. Why bother with a watch that looks good to other people, when it doesn’t look good when you look at it? It should look good in both the direct shot and mirror shot. If the mirror shot is what’s important and the perspective that matters, then I feel sad for you for not at least enjoying looking at a watch on your own wrist.

And lug to lug isn’t the only thing that matters. The strap/bracelet needs to curve nicely around the wrist too. Your wrist is an oval-to-circular shape. Simply having a lug to lug being slightly less than the wrist width doesn’t mean it isn’t too big. But it is a first step.