[Material] Minimap Zoom + Offset

Hi there.

I currently try myself in creating a Material for a texture based Minimap.
This is the Current State:

Having a texture - Check
Having an Offset based on a Focused Actor - Check
Having a Radial mask based on a gradient - Check

All that is missing now, is the Zoom.

I mean… I know I can multiply the UV with the 1-X of the Zoom Scalar… And it zooms the Texture… But… How to keep the offset, so the Targeted Actor will stay in the Minimap center?