Just had a go at throwing one of these together myself.......Not quite as elegant as Mac's Sub 1D version....I went with what I had lying around.... a direct drive 3D, powered by 3 x 9000Mah Ni-Mh D cells.
It amounts to pretty much the same thing - 1.2A on fresh cells.
Went out down by the canal where it's nice and dark and fired her up..........All I can say is WOW
On tightest focus it throw's like crazy (As we already know), but what really surprised me was how useful the spread of light was when de-focussed.
It's not just a show light - but actually really useable with a smooth, even beam.
Spent some time grinning like a fool as I shone it around on tight focus...Scaring a group of ducks from their slumbers about 300ft away down the canal and shining it into the night sky for the light sabre effect. :naughty:
No self respecting flashaholic should be without one of these.....Absolutely brilliant :rock:
Tim.