I had one of this “twist-to-focus” light namely Litknight TL-8743.
It’s a 2xAA light with extremely solid thick body with a solid pill. (Great anodizing too)
I would say it’s like the perfect light for modding due to thick walls for heat transfer
Except… that it has the ugliest doughnut beamshots ever
I was thinking of using TIR lens but I heard focusing TIR is impossible for an Osram emitter? Should I gamble by getting a TIR or just stick with conventional plastic/aluminum reflectors?
Depth of 10mm to 15mm is possible
Lens diameter is 22mm
Hated the full convex lens
I’m currently surveying parts in Fasttech but any suggestion is acceptable~
There are quite a few Osram emitters in various packages, do you know which one it is, or do you have a picture?
There's not a complicated optical reason why one or another led would not work with a TIR, as long as the led die is in the focus of the TIR. But I can imagine that the package of say a Golden Dragon is in the way when focussing it in the TIR. The Oslon leds should work well with TIR's designed for XP-G leds.
Eh?
Sorry. Didn’t realize the picture failed to show up
I’ve sharpened the “focused beamshot” to show you details of the die itself
I’m poor in identifying Osram but I sure do know this doesn’t look like golden dragon
thanks for the help
I was thinking of ordering this to try out to see if it fits Fasttech
I’m not going for maglite style focusing though.
I’m approaching for a fixed beam but worried TIR reflectors giving out odd beams
Why not just try a regular Plano-convex lens (and personally I’d do an emitter swap right away but that’s just me).
A normal aspheric lens (one side flat one side convex- Plano convex) and darken the white part of the emitter (sharpie should work) will give you a better beam, plus the way the bond wires are arranged looks cool (I still use an old XP-E amber in one of my little zoomies even tho XP-E2’s are finally available cause the bond wire pattern looks freaking awesome lol)
I did experiment with a plano convex lens I ripped off from a Sipik SK68 clone
Unlike the Sipik SK68, this Litknight zoomie only moves out to like 3-5mm max while the Sipik clone moves up to 10mm
so I got flood no matter how I twist the light >< (picture below)
Pretty much explains why it has full convex lens for max zooming ability.
I did think of an emitter swap but mann…. I do have a ton of Cree based emitter lights… Thought of exploring other LEDs I’ve never encountered before.
This are the only Osram light I own and the most longest lasting lights I’ve ever had in terms of runtime. :bigsmile:
Plus it has a weird pee-like milk white tint which is soothing to my eyes (I guess I’m weird)
so I was curious what mods I can do with an Osram based light 0:)
Especially on this light~
It looks like you indeed have a focus problem, perhaps the emitter housing is in the way and you need to file a bit off the undersite of the TIR to get it closer to the led. But then, if that was not the problem after all, you have ruined your TIR .
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