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Thread: "McR- xx" Reflectors

  1. #211

    Default Re: "McR- xx" Reflectors

    Quote Originally Posted by fyrstormer View Post
    Hi fyrstormer,

    thanks a lot for the link!

    I entered "reflector" into the search function and got only the


    How did you get that longer list?!

    I also still wonder about this:

    (1) What is approximately the opening angle of the beam when using one of the McR-18, McR-19 and McR-20?
    Unfortunately neither the specs under http://www.candlepowerforums.com/vb/...uot-Reflectors
    nor http://dmcleish.com/CPF/reflectors/ tell.
    (2) What is the difference between a McR-XX and a McR-XX-S?
    Just different measurements (e.g. from front/back) of the otherwise identical reflector?
    (3) Any ideas on where to find a constant current source for 6 A?!

    Again, thanks a lot!
    LarsB
    Last edited by LarsB; 03-16-2012 at 09:53 AM.

  2. #212
    *Flashaholic* fyrstormer's Avatar
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    Default Re: "McR- xx" Reflectors

    I didn't search, I used the menu. "Mod Shoppe > Opticalware > Reflectors".

    The difference between the McR20 and the McR20S is that one is designed for a Luxeon emitter and the other is designed for a Seoul emitter. The functional difference is the McR20S is slightly shorter at the back end, and the opening is slightly wider. That changes the focal point slightly. The -XR reflectors are designed for Cree XR-E emitters, which have a narrower beam pattern than other emitters.

    The "Dimensions" PDF file for the McR19-XR says the diameter of the reflector is 16.71mm and the depth of the reflector is 19.89mm. When I use the trigonometry calculator linked below, with the radius of the reflector input as Side A and the depth of the reflector input as Side B, the result for Angle A is 22.79 degrees. So the beam angle for the McR19-XR is going to be approximately 2x that, which is 45.58 degrees.

    http://www.carbidedepot.com/formulas-trigright.asp
    Last edited by fyrstormer; 03-16-2012 at 10:06 AM.

  3. #213
    Flashaholic* Mattaus's Avatar
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    Default Re: "McR- xx" Reflectors

    Hopefully this is the right place to ask, but I'm wondering about the availability of shorter reflectors like the McR-8, McR-10 and McR-16. Is the Shoppe the only place that sells these? What if these were required in larger numbers than the Shoppe can accommodate?

  4. #214

    Default Re: "McR- xx" Reflectors

    The McR series of reflectors is basically history. Certainly as regards to aftermarket availability. Sorry.
    Build Prices .... some mods and builds (not 4 sale) "Nature can be cruel- but we don't have to be."~ Temple Grandin

  5. #215
    Flashaholic* Mattaus's Avatar
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    Default Re: "McR- xx" Reflectors

    Ah OK. I had that feeling lol. I'll keep searching for good, small sized reflectors

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