>>3536338>WTF is a "digital" lens?
With film lenses, you had to get the image circle to fall properly on the film, since you can't correct for distortion or vignette when developing film
When DSLRs came out some genius realised the same lens design principles from the film age no longer needed to be followed, because with digital photography you can correct in post, or even in-camera. And thus lens manufacturers can don't need to invest so much on a team of engineers to perfect physical glass, as long as they can hire a programmer to develop an algorithm that hides those flaws in post
At least one small advantage is that has allowed lenses to be more compact and cost less