12.5mm Mini Secondary Optics (Plastic / 20-Pack)

Pros: Well here is a little plastic lens that focuses a 120 degree high bright LED into a nice tight spot with the die from the led projected as an image in the hot spot. They come in a pack of 20, all of mine are very consistent

Cons: None really, used with out a reflector you get a few artifacts (of oourse)

Other: A nice little lens that you would have to hunt high and low to aquire, thanks DX!

Pros: Clear, well made, very inexpensive.

Cons: None for the product. But the online form is making me add characters to get to the 500 character limit. The form gives me this error code:
"Please make informative reviews, reviews under 500 characters (all fields combined) will not be accepted. All fields aded together, your review does not contain more than 500 characters." I would not have to cut and paste in all this guff if the form told me how many more characters I have to add!!!
:) :) :)

Other: Great!

Pros: Nice product. These plastic lenses are of equal quality between each other..All arrived in good condition, not scratched etc. Works great.

Cons: Could be little bit cheaper (it's just a very small peace of plastic).
I thought it could help me to make my LUXEON 5.1W RGB LED shine in a smaller angle (not 120 degrees as it does), but it doesn't work very much with it...some effect can be seen, but construction of this LED includes a bunch of semi-light leaking white diffusion plastics and toghether it doesn't work as I expected.

Other: It doesn't help me, but that's my cas only with my LED. However no complaints at all, these are good lenses for quite good price.

Pros: High quality plastic lenses for your all needs. I use it in optoelectronic projects to improve focus and range of optical sensors. May also be used for other purposes. Somewhat pricy. One side is convex the other side is flat. Strongly recommended for all Do it Yourselvers.

Cons: the price is high for a bunch of plastic but it may be worth the price depending on application

Other: If you need it pay for it.
All fields aded together, your review does not contain more than 500 characters
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Pros: 20 lens for less than 3 dollars, you can't find in some where else. It is small, so it can fit some of my small flashlight. It really helps concentrate the light beam. It is plastic, so you can easily glue it to any surface.

Cons: It cannot fit to bigger flashlights. To them, it may even weaken the lightness, and cause a dark circle inside of the beam.

Other: Very cheap lens. You can glue it to every flashlight that you have.

Pros: Used these for a custom 1W led light, i needed a wide beam with a small profile. the lens works fine and is made of acrylic, this was good for me because i was able to shave the sides down to make it fit. hard to do with glass. all were in good condition with little nicks here and there.

Cons: small lens's with wide focus, not suitable for a tight focus but at this size probably not a problem.

Other: if you know what you want to do with them then buy them.