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21mm LED Acrylic Lens for Flashlight (5-Pack)

21mm LED Acrylic Lens for Flashlight (5-Pack)

3.10

5 (6 Reviews)

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  • 5 Star:674 (67%)
  • 4 Star:332 (33%)
  • 3 Star:00 (0%)
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    • Overall Rating: 5
    • Price: 4
    • Quality: 4
    • Ease Of Use: 5
    • Usefulness: 5
    2 DXPoints
    earned for this post
    Plastic TIR optics

    posted by Korkonen on 04/04/2013 Certified Owner

    Involvement:Expert (understands the inner workings) - Ownership:more than 1 month

    Pros:
    Plastic optics based on total internal reflection (TIR). The overall quality is ok, fairly efficient collimation of light from a power LED to a narrow beam. As a plastic optic the LED connections can not be accidentally short circuited as is possible with s...
    Cons:
    Max outer diameter of 21mm is a bit large for some milling taps that I have, a bit less than 20mm would have been perfect for m...
    View Detail » 
    • Overall Rating: 4
    • Price: 5
    • Quality: 5
    • Ease Of Use: 3
    • Usefulness: 4
    2 DXPoints
    earned for this post
    ok

    posted by Josh101 on 03/12/2013 Certified Owner

    Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month

    Pros:
    Good solid acrylic (plastic) lens, were delivered with no damage and were all there. Ok beam for the LED's i used
    Cons:
    The slot for the LED is too deep for any of the LED's i used. only have the cavity was filled by the led. so i am not sure the ...
    View Detail » 
    • Overall Rating: 5
    • Price: 5
    • Quality: 5
    • Ease Of Use: 5
    • Usefulness: 5
    2 DXPoints
    earned for this post
    acrylic collimator optic.

    posted by lasermanathome on 12/24/2012 Certified Owner

    Involvement:Expert (understands the inner workings) - Ownership:more than 1 month

    Pros:
    The nice thing of these kind of optics is the high percentage of transducing light into a beam wich has a divergence comparable of a wideangle laser. Expecially with R2 leds, it is difficult to beat the divergence, even recoil led flashlight included. Can e...
    Cons:
    Don't scratch them, handle with care. They CAN NOT transport heat, so the cooling of the led must be provided otherwise. Alumin...
    View Detail » 
    • Overall Rating: 4
    • Price: 5
    • Quality: 4
    • Ease Of Use: 3
    • Usefulness: 5
    2 DXPoints
    earned for this post
    Great little lens!

    posted by ollyk22 on 06/16/2011 Certified Owner

    Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month

    Pros:
    Use with Cree emitter is easy Nice clean optics Clean narrow beam
    Cons:
    Might need hot glue to stick to emitter Handle with care - can mark & scratch easily a bit lossy but sat in a standard refl...
    View Detail » 
    • Overall Rating: 5
    • Price: 5
    • Quality: 5
    • Ease Of Use: 5
    • Usefulness: 5
    2 DXPoints
    earned for this post
    Great Lens

    posted by steve000 on 05/20/2011 Certified Owner

    Involvement:Expert (understands the inner workings) - Ownership:less than 1 day

    Pros:
    These are great they really focus the LED and take away the flood. Id say the beam is around 5 degrees maybe 10degs. less than a normal LED at same distance.
    Cons:
    There is a lot of light being lost around the sides, id recommend coating the sides in reflective paint of possible, such as ch...
    View Detail » 
    • Overall Rating: 5
    • Price: 5
    • Quality: 4
    • Ease Of Use: 5
    • Usefulness: 5
    2 DXPoints
    earned for this post
    Can't go wrong for the price

    posted by seckinb on 01/05/2011 Certified Owner

    Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week

    Pros:
    + TIR optics + A clean throwy beam + Works well with an XR-E emitter + Can take the place of a reflector easily
    Cons:
    - One in the batch was scratched and a piece chipped in the delivery. - May need to adjust the emitter distance to perfectly ...
    View Detail » 
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