Andz

Black circle thing

In Cult's newest video, he has a lot of shots with this kinda clack ring surrounding the corners. Im pretty sure this is a mixture of a low mm lens and using a non-mirrorless lens or mirrorless cameras? I think? Getting the glass closer to the sensor or something? Im not too sure. I use a a7iv and would love to know what lens would allow me to do this? Or if there's an equation or something i can do for calculating mm with the sensor size? Does anyone know anything about this sorta stuff?

under $50

whats yalls go to gear under $50? i cant afford to daydream for $3000 lens anymore haha