> I sometimes do something similar on photos, where I darken the edges a bit.
Which is also an emulation of the shortcomings of older/worse technology.
Which is also an emulation of the shortcomings of older/worse technology.
Avoiding vignetting is a trade off between complexity, cost, weight, and other optical flaws. That said modern optical design and manufacturing has made it a lot easier to have nearly flawless (clinical) designs.