While HAM4 was open, I took a photo looking towards HAM5. I couldn’t quite reach safely down into the middle of the SR3 – BS path, so the attached photo was taken from just above that path. The photo shows a strong retro-reflection from the HAM6 septum. The septum is at a fairly small angle from the beam spots on the BS and SR2, is nearly normal to the beam, and is not vibration isolated like the other reflectors in HAM5. I think we want to include a baffle in our upgrade plans that keeps the septum from being visible from the BS or SR2.