Glass Optics for Flashlights (28mm)

Pros: Fits my Aleph 1 held by oring below and the crenallated bezel on top. Aspheric? Maybe, its got throw like an MRV with a cree led.

Cons: Its not 28.8mm a little loose. Might be better with stock retaining ring. Sharp LED focus requires turning the LE out a feew turns so no Oring seal from body to head.

Other: Buy one, no buy TWO!

Pros: Real easy to make an Aspheric AA-torch based on an Elly flashlight, just take out the lens and buy a G&P tactical flashlight head för Surefire C-series. Put some tape on the outside of the Elly head an assemble the G&P head on it... put the this lens in the G&P lensholder and adjust it to fokus the beam... extreme thrower on a single AA!! Mine easily throws over a hundred meters!!

Cons: Chips easily.

Other: Good for this project. Otherwise a bit limited.

Pros: It really does allow a focusable beam.
You cannot match this among the reflectors I have tried for a spot beam.
The beam is reasonable even at spread.

Cons: With the stronger (Cree etc) LEDs you get a square beam at max throw min beam width. This is unavoidable with a "normal" lens like this. It can be an advantage. If you put it diagonally, you get a slightly wider beam with good throw.
I did not get a completely smooth b3eam at wider spreads. not up there with some of the better special reflectors. BUt then they don't "zoom"

Other: Worthy of trial and experiment. Makes a versatile light a possibility.

Pros: Well it does what it says completely "projects" the cree die on the wall. If you like that sort of thing. I personally like the hotspot on a regular lens. This seems to add a square sort of hotspot. In the Ultrafire 502B the lens sticks out of bezel so if you drop it on the front end it could shatter. Cheap to try.

Cons: Not so hotspot, lens sticks out of bezel

Other: A fairly good buy, if you like a square beam projected. A cheap buy put on take off. Is this 500 already.

Pros: It's very good quality, no scratches or anything and very smooth, clear glass.

Cons: None really, except it tints the light blue. But that's only on con to me, to others it might be a pro.

Other: It does its job on the light I bought it for, and it's super cheap. Why not order one?

Pros: Real glass, not plastic. Fits P60 drop-in type flashlights (26mm reflectors). Projets emitter die pretty well. Looks like nice glass on the front of the flashlight.

Cons: Doesn't emit with the brighness I was hoping for. Hard to focus. Looks worse with reflector still installed and better without reflector, but installing emitter pill without reflector is difficult.

Other: If you think you have a use for this, get one, it's cheap enough to have fun with and not be disappointed if you don't end up using it in the end.

Pros: Overall a good lens if you want to use it for burning stuff. I bought this one to use with the ultrafire c1 and sku 905 to create a mini version of "the torch" and am pleased. It will light matches, burn holes in cardboard and paper, melt plastics, etc.

Cons: If you aren't using it for what I did, the beam is very funny looking. Mine has speckles in it and just has an odd look to the beam shape, not very appealing.

Other: Fun to play around with to use and burn stuff, but otherwise it doesn't have a whole lot of usefulness for me.

Pros: Very cheap and it will project an image.
Glass was very reasonable quality. Sure there are a few artifacts but nothing you'd ever notice when you shine it on real things outside. Of course it's not imaging quality.

Cons: Not what I'd call a real aspherical lens. I think it takes more than being flat on one side to be called an aspheric.
A real aspheric should have a curved surface designed to project an image without aberration.
Comparing it to my other lenses (both aspheric and plano-convex), I'm fairly certain that this is a plano-convex lens with a spherical surface.

Other: Fine if you've never played with a real aspheric lens. You'll put it in front of a cree and say 'wow it throws far'. However, if you know what a real lens is capable of, you'll throw it in your 'bits and pieces' box where it will sit forever. This is what I did.

Pros: 1. Cheap 2. Glass 3. Fun to experiment with 4. Decent optical quality 5. No noticeable imperfections in glass 6. Can turn your XR-E into a throw-beast

Cons: 1. Not true aspherical lens 2. Lots of artifacts 3. Can be hard to screw down some bezels due to the thickness of the lens edge 4. Just makes XP-G emitters look terrible - stick with XR-E

Other: I'm going to buy another just to keep around. They're fun to play with. Different P60 drop ins and hosts will react differently due to the focal length. If you're curious - just buy one!

Pros: Really focuses the beam in a P60 drop-in. I used an Ultrafire WF-504B with an R2 drop-in and it focused the beam down to an image of the LED just like my X2000 flood-to-throw light does on full throw, only a little tighter (maybe 75% of the size of the X2000 at the same distance). Real glass optic seems to work a little better than X2000's plastic, but of course you can't switch to flood. But if you just want the throw effect, this is a cheap way to accomplish it. Fits in place of the 504B's lens. The bezel won't tighten all the way down, but it is plenty to hold the lens in place.

Cons: You need to black out the reflector because the only light being focused is what comes directly from the LED. Anything that bounces off the reflector is being sent into a weird pattern of speckles. So you aren't concentrating all of the light like a flashlight with a big reflector would do.

Other: Why not? If you have a P60 light or a bunch of them, this gives you a different effect that could come in handy.