Side beam test
I made a simple test rig to see the beam pattern over a quarter circle.
Propped up some computer paper and marked 0 45 90 degrees on it.
Blinkie in the middle pointing at zero.
Camera across the room pointed at the 45 mark.
Here we have PBSF, MARS 4.0, LD1100
Camera settings the same for all three.
Central pattern over exposed.
Yes the mars sidelights point forward a little, same on the 2.0 version.