How to Change the Lens Length of a Film

Likeri: It 'd be interesting to very slowly change the lens length. I don't know if it ever been done, but it would be interest how you're kind of altering the perspective i mean, i know shop films where you've started with one more strongly at one point, and then segwade into the other character. And i was thinking about sucario, where basily between emily's character and benicio's character, and at one point the perspective shifts and you go with benicio to see that. Ye, i think that sounds really interesting. But you'd really have to plan it out, because if you were going longer and longer and longer,