4mm optimaF on collimator
~4X3.5mm Did not take exact measurements on the near field just verified they would fit 5mm scanners.beam size
.3X1.4mradmrad
About 30-35mmdistance from diode to 1st CV cyl
from "edison" member here on PL. They are 6X where Dave's are 4Xwhere did you get this cyls