Hi Grunken,
Possibly you could achieve this using the "Forward Distance" parameter: It does something similar as focal length would do, however it works even in the LatLong mode. Issue is that it works in the direction contrary to what you wish to achieve - it kind of gets you further away instead of into the scene. You would need to go to negative values, and the parameter normally has range from 0 up. See attached an instance of a preset - it is all on default so you need to set again all the parameters, but with this hacked preset, the "Forward distance" should allow you to go to negative numbers. Please test and tell us if this worked for you!Forward.grp