Linear Camera Zoom To Spherical Zoom

Hello Unreal Engine communauty,

I’m new on Unreal Engine and I would like to make a spherical zoom. Image below show what my camera behaviour and the behaviour that I need :
Camera.png
I followed a tutorial to make a camera zoom smooth with clamped value, I followed this tutorial :
http://unrealpossibilities.blogspot.fr/2014/12/unreal-engine-4-tutorial-smooth-zoom.html

Here my blueprints :

Thanks you for your time :slight_smile: