Hey folks.
I recently bought a wista45dx 4x5 camera with a 210mm 300mm and 90mm lens.
I've shot it so far with a 90mm, 300mm and a 240mm (rented)

I bought the 300mm to be shot wide open in order to achieve minimal DOF. But I was disappointed that, at maximum extension, I could only do full body shots. When my goal was to do bust shots.
The 240mm allowed me to get closer but still not close enough for a bust shot.

The 90mm was no problem for bust shots but I won't have the DOF wanted. also is there significant distortion shooting with the 90mm when the subject less than a meter away from the lens ?

I was wondering if there was a Goldilocks lens for that camera where I could have great DOF and I could do busts. or if I got a 4x5 camera with longer bellows if that would allow me to focus closer.

thanks