The Perfect Flood: Aspheric R2 vs. MTE P7

55mm Aspheric R2:


MTE P7:

Together. About same length (6"), but the aspheric R2 is a lot beefier

Beam shot: MTE P7 left, Aspheric R2 Right.
The Aspheric R2 is almost as bright, with a slightly smaller spill but well defined perfect flood.
Warmer tint a bit easier to the eye, does have a center hot spot too.
Estimated Lumen output:
Asphric R2: 325 lumens; MTE P7: 450 lumens, 1/2 of what's claimed on the flashlight.



Component List:
DX Beefy Aluminum Host, same battery chamber as DEFT, but slightly smaller head
Cree R2 mounted to flashlight body with home made Aluminum Pill
2x800MA chip in parallel, 1.6A combined (If battery could deliver?)
4xAA Engineer = 6V
55mm 38.5F Surplus Shed Aspheric lens
Home made lens adapter inside the bezel

Awww. Its the DEFT's kid brother. Nice job. Do you have any outdoor beamshots?

Thanks, this was indeed inspired by the big brother DEFT!

However, I don't have any out door shots, because for one, this kid brother has never left the house. Two, I was going after the perfect flood for indoor use, de-focused Aspheric so there's won't be much throw for our doors, may be slightly longer throw than P7 due to more contrast with surrounding darkness.

Just so that the brothers won't feel lonely, there's another DEFT kid brother coming, it'll be a DEFT Toddler :laughing:, taking the similar looking but smaller 4xAAA DX host + 50 mm aspheric.

I don't have a real use for throw, I just find the Aspheric flood beam more appealing than the typical reflector hot spot/spill combo.

LOL .... the DEFTs are breeding

ma_sha1, how well can your light focus, can you focus it so that you get
a sharp die image without the lens/bezel ring falling off ?

tx101 said:

LOL .... the DEFTs are breeding

ma_sha1, how well can your light focus, can you focus it so that you get
a sharp die image without the lens/bezel ring falling off ?

Click to expand...

I glued the blue lens holder in place so it won't move anymore.
Before I glued in the lens holder, I could push the lens all the way up inside the bezel to get the sqaure die image. There's a 3mm gap between the lens & the side wall of bezel, so a holder is needed regardless on where you want to position the lens, otherwise it'll fall all the way down inside of the flashlight body & sit on the Cree.

There's enough distance within the bezel to allow correct focus for throw.
As you can see, my lens sit quite deep inside the bezel.
However, at focus, there was still a faint spill around the square die,
so not all (but most) of the light was focused into die spot.

I think that some light bounced around between the inside surface of the front & back of the lens may get released & created the faint spill.

Perhaps, an AR coated lens would fix that, but will drive up the cost.
For flood use, it didn't matter as the bounced light are all in the circle.

Thanks for the info Ma_sha1
I might have to build one of your "DEFT Kid Brothers"
while I wait for my DEFT BIG brother :devil:

Unfortunately, I wasn't able to enjoy my build long.
I dropped the Lens on the floor & got a big chip on one edge.
that messed up the beam. :mecry:

I since ordered 4 small aspheric optics that one guy used to wire up 4x Q5 Asphircal diving flashlight
thinking maybe I'll convert it to 4 led Aspheric instead?

I decided to turn the bad situation into a good one.

I made a big heat sink & mounted 4 Cree R2 in to the Big Head.
Since the Switch has 3 wires that controls two separate circuit.

I wired the 4 R2 into two separate set of light control:

Click once, two led light up, wired to one IC chip in parallel.
Click twice, all 4 led light up. second set of LEDs are wired
with each of it's own IC chip.

Since group of two leds & ICs are wired separately,
This allows two level of security, if one set of Led or IC chip goes down
for some reason, the other set will still work.




The beam is from set of 4 DX 8 degree Optics.
Gives out beautiful Neutral while color, not blue tint.
The hot spot is rather large, smooth & well defined, reminds me of the M6 beam pattern, just not as bright.

Trying to figure out why it isn't as bright as I thought.

Here is the battery set-up: 4.5V input in a 6V holder with
one dummy cell. I tried to re-wire the holder into 3V with 2 set of
E2 Lithium in parallel, but the 4.5V arrangement is brighter.

This is the IC chip I used, it works on both 3V & 4.5V,
but the latter is more efficient.
http://dealextreme.com/details.dx/sku.4735
This is a test resulte posted at DX site:
V in I in P in Vout Iout Pout Efficiency %
1.40 1.03 1.44 3.07 0.32 0.98 68%
1.57 1.14 1.79 3.07 0.32 0.98 55%
1.81 1.58 2.86 3.23 0.39 1.26 44%
1.95 1.42 2.77 3.31 0.49 1.62 59%
2.15 1.24 2.67 3.34 0.52 1.74 65%
2.50 1.22 3.05 3.18 0.59 1.88 62%
3.00 0.95 2.85 3.10 0.65 2.02 71%
3.50 0.82 2.87 3.37 0.68 2.28 79%
3.98 0.89 3.54 3.27 0.93 3.04 86%
4.28 0.95 4.07 3.51 0.97 3.40 84%

Since I am using 3 IC chips in parallel to the battery,
looks like the IC chip will need 3A from battery, ~1A per chip.

Any ideas?

ma_sha1 said:

...I since ordered 4 small aspheric optics that one guy used to wire up 4x Q5 Asphircal diving flashlight....

Click to expand...

Who would do such a thing?:naughty:

Will 4 NIMH work well in this set up?

how much did it cost u?