Maya zooms-out faster than 'zoom-in' in ortographic cameras.
It is very noticible when using mouse wheels on zoom, 10 scrolls to zoom in, 2 scrolls to zoom out.
It is also but less noticible when using Alt + RMB, just zoom-in an object very deeply and when you zoom-out you will see it is faster than zoom-in.
It only occurs in ortographic cameras.
Is there any option, any code or anything to change this behaviour ?