Editor slow down when working with longer focal length 4.27

Hi there,

I’m currently working on a cinematic in UE4.27, and i’m facing an issue that I can’t find any answer to, nor any documentation.

UE4 is really slowing down when I work with 50mm+ lenses in the cinecamera actor. The longer, the worst. Performance drops from 30fps (camera with 24-35ish mm lens) to like 3fps and it’s going from 30-40ms to 300ms ++

I don’t know if it’s a wellknown issue ? Or if anyone has exeperienced something similar ? Any hint would be greatly appreciated !

Cheers

(Working with a 3080 btw)