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

SKU: 41690 (Added on -)
Price:
US$
3.68
Shipping: Free Shipping To UNITED STATES
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Ships within 7-10 business days
Direct: Worldwide US
21mm LED Acrylic Lens for Flashlight (5-Pack)
This SKU 41690 is available in US direct. US: 901041690
- Angle: 6 degree
- Diameter: 21mm
- Material: Acrylic
- Comes 5pcs per pack

Dimensions: 0.83 in x 0.83 in x 0.55 in (2.1 cm x 2.1 cm x 1.4 cm)
Weight: 0.71 oz (20 g)

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Quantity 3+ units 5+ units 10+ units
Rate USD$ 3.26 shipped USD$ 3.25 shipped USD$ 3.24 shipped

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Average Customer Review (6 customer reviews) 5

100% of customers would recommend this product to a friend (6 out of 6)

  • 5 star: 4 (0%)
  • 4 star: 2 (0%)
  • 3 star: 0 (0%)
  • 2 star: 0 (0%)
  • 1 star: 0 (0%)

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  • Plastic TIR optics

    posted by Korkonen on 14:52:12 G4T 04/04/2013 certificated customer

    Involvement Level: Expert (understands the inner workings)

    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 some metal reflectors.

    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 my 20mm tap.

    Other: No real cons. Good TIR optics for experimentation with a reasonable price.

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  • ok

    posted by Josh101 on 19:55:12 G3T 12/03/2013 certificated customer

    Involvement Level: Expert (understands the inner workings)

    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 focus was what it was supposed to be.

    Other: if you cant a reflector slash lens all in a one package, get these.

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  • acrylic collimator optic.

    posted by lasermanathome on 15:10:19 G12T 24/12/2012 certificated customer

    Involvement Level: Expert (understands the inner workings)

    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 easily made fit in W501 as an alternative for its reflector.

    Cons: Don't scratch them, handle with care. They CAN NOT transport heat, so the cooling of the led must be provided otherwise. Aluminumreflectors do cool leds partly these optics DO NOT.

    Other: Low costs, nice optics for people who like to experiment with light. These optics are VERY suitable for IR powerleds. The one Watt version gives a more satisfiing result as the 3Watt led wich has 3 one Watt cristals but not in center of that type powerled so even collimation with this optic gives not a nice spot.

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  • Great little lens!

    posted by ollyk22 on 05:54:02 G6T 16/06/2011 certificated customer

    Involvement Level: Expert (understands the inner workings)

    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 reflector helps to reduce this. I personally would be sceptical about painting the sides as this will only absorb light?

    Other: Great lens allows you to throw the beam a great distance
    Excellent price point allows you to experiment more to get things just right and have spares left over!
    I plan to try different reflectors / lens' so it will be interesting to compare..

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  • Great Lens

    posted by steve000 on 04:43:01 G5T 20/05/2011 certificated customer

    Involvement Level: Expert (understands the inner workings)

    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 chrome paint

    Other: awesome product.
    get hot glue ready to attach to the 5w LED, they fit CREE led's fine.

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  • Can't go wrong for the price

    posted by seckinb on 02:40:28 G1T 05/01/2011 certificated customer

    Involvement Level: Expert (understands the inner workings)

    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 fit into the optics, in modding a current light.

    Other: An easier way to build a thrower with a good amount of optics for $3.

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