Then to turn off moonlight the light goes into low first and then off
Yeah, I played with this a bit last night, alerted by 357mag1's complaint, and that's what I found, too.
It's not quite as bad as 357mag1 said: it only jumps to Turbo mode if that was the last mode you used. Mode memory--it jumps to whatever it was last set on. That's why Vinh's jumped to low instead.
Still, it is does seem to be baked into the factory UI, and it's not ideal.
How bad is it? Practically, not a big deal. To turn it off, you just obscure the bezel (press it against your leg or whatever) and double-click (low, off).
About throw performance: this outthrows both my TX25Cvn (Pocket Queen) Spec 2 and my TX25C2vn (Pocket King) Spec 3.
The TX25Cvn throws around 60k lux, but the SD4Avn clearly walks over it. And its hotspot is twice as big (XML vs. XPG).
My TX25C2vn also has the XML, so the hotspots are the same size. But the SD4Avn is *considerably* brighter. I would say twice as bright, but that judgment is only impressionistic until backed up by a light-meter.
Other points: the heavy fins do a great job heatsinking.
D-cell support is good, but for top performance you'll want to use 4x Eneloops, as designed.
On an absolutely fresh D-cell, you can see a difference in all four main modes (though hardly any difference between high and turbo). On a D-cell rated 80% by my ZTS meter, you can only see a difference between low and medium--high and turbo just give you medium over again. It's the normal alkaline problem--it simply cannot produce the amps needed for high performance, and when you ask it to, it drains the cell rapidly. But if you restricted yourself to low and medium (and moonlight of course), you could get a lot of use out of D-cells. (and ditto for C-cells, AA, and AAA with some improvising).
357mag1 did not see a difference between high and turbo--I'm pretty sure that's a battery problem. Get some fresh Eneloops, charge them up to full, and you should see the difference clear enough.
