I have a whole load of pictures of it and beam shots, but no info of where the head was set
But, my examples ( i have 3 of them) best, tightest, longest beam is not screwed all the way out.
Here is my server directory of all my various shots.
The other smaller lamp is a $200USD DereeLight NM800, NOT worth the extra money. Beam pattern is a bit better, but you pay 10 times the price.
If you went to my thread about these lamps, you will come to a post where many of those pictures have text explaining them