I'm in desperate need of some good 24mm x 1.5mm AR lenses, to fit Roche F6 (and also a source for non-crap versions of the F6 too, if anybody can help). Can't find anything at all in the correct size.
Maybe???
| LF24061 | Lens Prot. Fused Silica 24mm x 1.5mm (.950" x .060") Coated both sides AR/AR @ 1064 |
How much tolerance? Flashlightlens has 22.61x1.85 and 22.4x1.85
http://www.flashlightlens.com/index.php?app=ecom&ns=prodshow&ref=ucl_lens
Looks... expensive! Is that even applicable to flashlight use?
Nope, unless it was kept perfectly centered it would fall off one side of the o-ring (this light has the o-ring on a lip in the head, then the lens, then the bezel, no o-ring between lens & bezel like most other lights). Lens has to cover the whole o-ring or else it doesn't flatten out and seal correctly to the ID of the head.
Sorry, I was in a hurry. 
And the 2nd @flashlightlens should have been the 24.7x1.85. Is there enough extra room? Grinding .7mm off should be doable, if tedious.
No, due to the o-ring/bezel design lens thickness can't be changed. It would need both a thinner o-ring and shaving down the bottom of the bezel (not enough threads on the bezel to make up the difference only in front of the lens). And the thinner o-ring part is what makes it not possible, that would shrink the available space between the LED shelf & lens, the F6 doesn't have a removable pill, it's all one piece. :(
With no o-ring in front of the lens (between bezel and lens) is it water tight? I found my 2 examples of EE X6 were not water tight at all without a o-ring there, had to end up moving it from the other side (stock location).
Ric CNQG) has a thread for requesting AR lens sizes. Tried that?
The o-ring setup is the same as a SRK. The bezel presses down on the lens, the lens squashes the o-ring down & outwards to seal against the ID of the head. Moving the o-ring to the other side would only seal the bezel to the lens.