First thing I thought when I saw the photo was……
“Ok, who in the HELL would attach a collimated lens BLF GT to a……???”
Then I thought………ENDERMAN!!! (Think Seinfeld and “NEWMAN!!!”)
Anyway I thought the guy’s (Automatic Choke) post @ 22:09 on 7/2/18 was most interesting where he talks about entendue, industrial IR Collimation, etc.
When they start coming out with those Acebeam laser flashlights I think I’ll start wearing welding glasses 24/7.