Matplotlib visualization of surfaces and thier normals

Question

I am trying to plot normals to a surface and examine them in a 3D scatter plot. I have seen that the aspect_ratio setting is only valid for 2D. In matlab there is the 'equal' setting that makes the normals look ok (orthogonal to the surface at a point), but I fail to find a setting in matplotlib that takes the screens aspect ratio as well as the data set into account and adjust the plot accordingly.

Below a normal to a surface is plotted, but the normal does not appear to be orthogonal. It would be great to have a working solution for this type of problem. If there are many surfaces and a more complex picture it is good to be able to visualize them.

Does a setting exist for this problem or is the Matplotlib not the way to go, if so what should I use instead?

Best regards!