Recent content by ZDP189

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  1. Z

    Ultrafire RL-2088 vs WF-1000L indoor beamshot

    Here is a comparison of the latest high-output offering by Ultrafire, versus last year's top model. Model: Ultrafire RL-2008 Range: 1m ISO: 100 Aperture: f/10 Shutter: 1/125 Focal length: 15mm (70mm at 35mm sensor equivalent) White Balance: Cloudy Model: Ultrafire WF-1000L Range: 1m ISO: 100...
  2. Z

    LED replacement for halogen spot - Current best?

    It's Summer again. Every summer my lift (elevator) gets baking, baking hot because it's not air-conditioned and constantly burns 4 x 20W halogen bulbs. It also costs us more than US$100 to run those bulbs per year and I am told that our lift service people cannot or will not convert them to...
  3. Z

    Active IR Vision System

    Just be careful. It may be illegal to drive without lights at night. Obviously you won't be pulled over by another cop, but you may find yourself defending a civil action or a disciplinary hearing if you are involved in an accident.
  4. Z

    IR Illuminator recommendations.

    I have a Spiderfire IR flashlight. That does the job for messing about at 3W and was very cheap. To significantly upgrade, consider a proper collimated source.
  5. Z

    IR Question

    In military terms, one wouldn't want to be emitting any IR wavelength at all, seeing as every man and his dog are carrying intensifiers. Unsuspecting girlfriends however, can't see the further wavelengths. Unless they also have night vision.
  6. Z

    Night Vision supplier in Hong Kong?

    I know there are HK-based enthusiasts here. Please help. I am looking for reasonable quality NVGs and an IR camera set up. I am trying to catch some poachers who are illegally logging sandlewood. Does anyone know of a good low priced night vision supplier in HK? Not an ebaly reseller, but a...
  7. Z

    $30 Night vision.

    An ohm-meter will show high resistance one way and no resistance the other way.
  8. Z

    Is it worth getting a Fisher Space pen?

    I owned a space pen and the biggest problem was getting it to write even on paper. If you ask me, I wouldn't bother.
  9. Z

    Has anyone tried the Ultrafire?

    Fifteen bucks for postage! Haha.
  10. Z

    Can you run CR123s in parallel?

    I need to know the best way of dealing with excessive current drawn through CR123s. I am experimenting with 20W and 50W 12V halogen bulbs and a stack of CR123s. I am overdriving the bulbs to 15V with one extra CR123 cell. The bulbs seem to handle it without complaint. The cells cannot handle...
  11. Z

    only 50,000 lux from my mag :(

    I'm doing something similar with a 50W 12V halogen in a 50mm dichromic reflector. I am, however, exploding a lot of CR123s getting there.
  12. Z

    Ten Million REAL Candle Power - Got me in trouble!

    Thanks for the laughs. Oh how I want to try that for myself for real. I reckon you'd need a lot less than that amount of lighting to achieve ignition. Say, I have a BIIIG question. I found this thread googling for calculation inputs. A halogen bulb is supposed to have an efficiency of...
  13. Z

    Who doesn't collect Flashlights

    Re: Who doesn\'t collect Flashlights I'm kinda borderline. I have more flashlights than strictly necessary, but I don't buy just to own and I have no plans for building a coherent and intentional collection.
  14. Z

    Max Power Maglight?

    Hi, I have an old 3D Maglight I love the form factor. Unfortunately, technology has moved on quite considerably since the 1980's and my slightly less old (1990's) SF 9P p*sses all over it in terms of performance. With today's advanced technology, it should be possible to build a monster...
  15. Z

    174 Lumens for the poor man.

    Inspiring!
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