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drywh

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drywh last won the day on May 15

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About drywh

  • Rank
    Triggerfish

Profile Information

  • Gender
    Male
  • Location
    Hongkong

Additional Info

  • Show Country Flag:
    Hong Kong
  • Camera Model & Brand
    Olympus EM5ii
  • Camera Housing
    Meikang
  1. Just returned from Anilo, took some photos and tested my strobes。 And some internal construction photos
  2. Light passes through the interface between water and glass and is incident vertically. So that's the same.
  3. Prism is the best maybe , Since optical paths are reversible, the opposite arrangement is also true.
  4. Convex lenses converge light. Convex lenses must be placed in air, not in water.
  5. It was found that each camera has an LED focus light. The power of this focus light is small, but the camera's focusing system is particularly sensitive to this orange-yellow light. Because the camera case blocked the camera's focus light, I specifically looked for On a few of these focusing LEDs, requesting the factory to customize this light. On land test, the camera will focus quickly. When you take a pic with flash, there is not any visible orange-yellow spots in the photos. This orange-yellow Light will not scare the creatures in the water maybe.
  6. Hi ! I don't think that the potentiometer is not broken, it just rusts the surface. I didn't continue to fix the flash because I saw that an electrolytic capacitor on the board had been corroded by seawater to leave only a little bit, so it is inferred that there are many electronic parts that are also affected by seawater, if I need to fix it. Spend a lot of time and look for problems one by one. If you know exactly which part is broken, then this fix is ​​easy and worthwhile. If the potentiometer is broken and you can't find a potentiometer with the same shape, I can find the same carbon film inside from other potentiometer , just replace the carbon film. I don't think that the potentiometer is not broken, it just rusts the surface. I didn't continue to fix the flash because I saw that an electrolytic capacitor on the board had been corroded by seawater to leave only a little bit, so it is inferred that there are many electronic parts that are also affected by seawater, if I need to fix it. Spend a lot of time and look for problems one by one. If you know exactly which part is broken, then this fix is ​​easy and worthwhile. If the potentiometer is broken and you can't find a potentiometer with the same shape, you can find the same carbon film inside, just replace the carbon film.
  7. This is a broken underwater strobe. I took it apart and found that there were only a few droplets in the housing. The droplets were salty. The potentiometer is seriously rusted, so the position of leakage is the knob to regulate power. Knobs turn potentiometers, but their axes are difficult to align. This will push the O-ring to one side, creating tiny gaps and slow leakage. Sea water also causes an electrolytic capacitor to be dissolved.
  8. Enjoy DIY. btw , $72.15, I can do many of these gorpo strobes.
  9. That is a strobe module from old digital cameras, about 10-12 GN
  10. GoPro住宅中的一个闪光灯
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