Malkoff
Results 1 to 13 of 13

Thread: Surefire U2 Pyrex window question

  1. #1
    *Flashaholic* precisionworks's Avatar
    Join Date
    Apr 2007
    Location
    Benton Illinois
    Posts
    6,096

    Default Surefire U2 Pyrex window question

    The search function didn't bring up anything about this ... the Pyrex window on my new-last-week U2 has a curved outer surface. I'd call it a meniscus or diopter lens, which somewhat explains the wide spillbeam. Any links to other posts on this?

    TIA.
    Surefire® boring including E-Series & Weapon Lights, gun repairs, blueing & custom work * PM's disabled * Please Email & PayPal through Precision-Gunsmithing.com

  2. #2

    Default Re: Surefire U2 Pyrex window question

    Its just a domed "window" as Surefire calls it.

    The spill is probably just due to the reflector



    1000......beeeeeeyotch!
    Last edited by DaFABRICATA; 01-19-2008 at 06:23 PM.
    Flashlight Modifications available upon request
    "I have to go return some video tapes." -Patrick Bateman



  3. #3
    *Flashaholic* greenLED's Avatar
    Join Date
    Mar 2004
    Location
    La Tiquicia
    Posts
    13,244

    Default Re: Surefire U2 Pyrex window question

    Lux V's pack 4 LED dies on a single surface and emit a broad beam by default.

    If anything, the deep reflector and the domed window (it's not a solid diopter lens) help focus the beam somewhat.


    DeFab sneeks a post while I was typing...
    Quote Originally Posted by DaFABRICATA View Post
    1000......beeeeeeyotch!
    Call me when you break the 10000

  4. #4
    Flashaholic* adamlau's Avatar
    Join Date
    Dec 2007
    Location
    Los Angeles
    Posts
    2,074

    Default Re: Surefire U2 Pyrex window question

    Helps provide for a wider field of view. Examine your reflection from the back of a round spoon and you will see what I mean.
    强光手电是我最爱得

  5. #5
    *Flashaholic* precisionworks's Avatar
    Join Date
    Apr 2007
    Location
    Benton Illinois
    Posts
    6,096

    Default Re: Surefire U2 Pyrex window question

    I do appreciate the responses, and it makes sense that the reflector + lens combination are designed to give the beam the characteristics desired by the manufacturer. There's a dramatic difference in the E2L beam (spotlight) and the L4 (floodlight) and the U2 (floodlight with wider spillbeam).

    Do any other Surefires use the curved lens?
    Surefire® boring including E-Series & Weapon Lights, gun repairs, blueing & custom work * PM's disabled * Please Email & PayPal through Precision-Gunsmithing.com

  6. #6
    Flashaholic* Schuey2002's Avatar
    Join Date
    Sep 2003
    Location
    Out West
    Posts
    845

    Default Re: Surefire U2 Pyrex window question

    Quote Originally Posted by DaFABRICATA View Post
    Its just a domed "window" as Surefire calls it.

    The spill is probably just due to the reflector



    1000......beeeeeeyotch!
    Whatcha' going to be giving away?


  7. #7
    Flashaholic* Federal LG's Avatar
    Join Date
    Nov 2007
    Location
    Demiplane of Dread - Ravenloft
    Posts
    1,578

    Default Re: Surefire U2 Pyrex window question

    Quote Originally Posted by greenLED View Post
    .....Call me when you break the 10000


    "I LOVE THE SMELL OF LITHIUM BATTERIES IN THE MORNING..." - Kilgore

  8. #8
    *Flashaholic* precisionworks's Avatar
    Join Date
    Apr 2007
    Location
    Benton Illinois
    Posts
    6,096

    Default Re: Surefire U2 Pyrex window question

    Still wondering if any other Surefires use the curved lens?
    Surefire® boring including E-Series & Weapon Lights, gun repairs, blueing & custom work * PM's disabled * Please Email & PayPal through Precision-Gunsmithing.com

  9. #9

    Default Re: Surefire U2 Pyrex window question

    The older model KL1 (used on E1L, E2L), the old X200A, the KL3 (2nd Gen), the older (luxeon III) L1, the L5, the L6, and the L7. They all used domed Pyrex windows (apparently the E2D also has a domed window)

  10. #10
    Flashaholic* Ty_Bower's Avatar
    Join Date
    Feb 2004
    Location
    Newark, DE
    Posts
    1,189

    Default Re: Surefire U2 Pyrex window question

    I had been led to believe the curvature of the Pyrex window on the U2 was only for structural integrity, and had little or no impact on the distribution of light.
    The only reason a great many American families don’t own an elephant is that they have never been offered an elephant for a dollar down and easy monthly payments.

  11. #11
    Flashaholic
    Join Date
    Dec 2002
    Location
    Littleton Colorado
    Posts
    129

    Popcorn Re: Surefire U2 Pyrex window question

    As to your integity claim! I had to send my U-2 back in because the Lens had broken in half. Surefire has had it for 6 weeks at this time. They have been waiting for replacement Lenses. I really miss my U-2 I use it as EDC.
    But Surefire stands behind their stuff REALLY WELL.

  12. #12
    Flashaholic cbxer55's Avatar
    Join Date
    Jan 2006
    Location
    Somewhere in OK
    Posts
    331

    Default Re: Surefire U2 Pyrex window question

    I use mine as an EDC as well. I have had mine since Jan. 2006 and have not had one problem with it. Love the beam pattern, more so than the Fenix P1D-CE I also EDC.
    What would cause your lens to crack?

  13. #13

    Default Re: Surefire U2 Pyrex window question

    Don't forget, the Kroma also has this.

    And I also suspect it is more for protection, than optical usage.
    EDC: MilkySpit 1000-lumen Tri-MC-E L5
    In the car:
    MillerMods Quad-Cree 2D Mag At home: Mettee Tri-P7
    Missing somewhere =( :
    MilkySpit MC-E 2-stage UltraFire C1 SS 123 Keychain Light

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •