The spot @ 10 meters is approximately 50 cm in diameter.
This is a compromise between collimation and focussing, it’s “the best it can do” so to speak.
Hmm, when you put it like that, i guess it’s not too bad.
No i don’t have a lux meter (yet)
I thought i’d compare it with a known light: the Jacob A60.
The recoil setup seems to outthrow the Jacob hands down, which is not bad either.
Hmm that's alright I guess. Maybe look into buying one in the future if you're into flashlights a lot, I got one for $50 a while ago and it has been extremely useful.
For myself, I also contacted a company that makes real reflectors, and it's like $700-1000 for a nice 16 or 20" reflector xD a bit pricey!
Yeah, you’re right.
I thought it was like 120° but it’s actually 140°
This may explain why it does considerably better (lumen / wise) than the A60.
When my camera battery is full i’ll do some shots from the screen towards the LED, hopefully it will show how much of it is actually doing the good work.
It seems the outer perimeter of the reflector is a little ambiguous though.
The contest everyone is talking about is the Annual Scratch-built Flashlight Contest which has recently closed for this year, and winners haven’t even been announced yet.
I made some nice and grainy shots facing the light from about 20 meters away, light on extremely low power of course:
Left is taken from left, middle from the middle and right from the right of the hotspot.
I conclude the outer perimeter of the parabola reflects too much inward, the ring section inside that is okay, inside that one seems to reflect a little too much outward, the middle is okay.
(The most outward perimeter is not parabolic but flat so that does nothing at all.)
Yeah looks like a bad parabola, that's unfortunate. You're getting the same effect that djozz got with the outer part of the parabola focusing inwards.
It should still work alright for a handheld flashlight, but probably won't get 1M lux :/
…and then a ring that’s okay, and than a ring that reflects outward, and then another change in angle…
Considering glueing rings on the back pushing and pulling it in shape, but…
Not sure it’s worthwhile to continue with it.
As a mirascope it’s not much good either…