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> Govt buildings have lens detectors. Care to explain? If I point a camera at my local Fed building while walking on the nearby sidewalk, are you telling me th

> Govt buildings have lens detectors. Care to explain? If I point a camera at my local Fed building while walking on the nearby sidewalk, are you telling me that's detected somewhere?

neltnerb 8y ago
I'm surprised it works outdoors, I would think the red light would be impossible to pick out of a high resolution image even with a fine filter.
- bonestamp2 8y ago
  As far as I understand, these laser scanners work outdoors in daylight: https://www.popsci.com/technology/article/2013-05/laser-scanning-device-can-detect-faraway-optical-lenses-let-troops-know-who-watching https://www.popsci.com/technology/article/2013-05/laser-scan...
  - weinzierl 8y ago
    > Lasers sweep the surroundings and when they detect a CCD, they fire a bolt of light right at the camera to obliterate any photograph Color me skeptical. Does it detect the lens in the eye too? And then? Does it obliterate my retina when I look at his yacht?
    - bonestamp2 8y ago
      If you've got a CCD in your eye then ya, I'd be concerned about that.
cwkoss 8y ago
I have heard stories of feds coming out to stop people taking pictures of federal buildings. Always assumed it was security policy, but would be funny if it was just, "Damnit that guy is making this alarm go off non-stop, Dave, go get him to move along"
rococode 8y ago
Not a technical explanation but a story about a similar thing: https://www.wired.com/2009/09/russian-billionaire-installs-anti-photo-shield-on-giant-yacht/ https://www.wired.com/2009/09/russian-billionaire-installs-a... I remember this article as the first time I learned that photo-taking can actually be detected. Given that it was written in 2009, I imagine that the general camera-detecting technology has been mostly figured out by now.
- Antonio123123 8y ago
  So when it detects a lens, it shoots light to destroy the photo. If the detection is not ideal, it could detect eyeglasses and shoot light into people's eyes

> Govt buildings have lens detectors. Care to explain? If I point a camera at my local Fed building while walking on the nearby sidewalk, are you telling me that's detected somewhere?

neltnerb 8y ago

I'm surprised it works outdoors, I would think the red light would be impossible to pick out of a high resolution image even with a fine filter.

bonestamp2 8y ago
As far as I understand, these laser scanners work outdoors in daylight: https://www.popsci.com/technology/article/2013-05/laser-scanning-device-can-detect-faraway-optical-lenses-let-troops-know-who-watching https://www.popsci.com/technology/article/2013-05/laser-scan...
- weinzierl 8y ago
  > Lasers sweep the surroundings and when they detect a CCD, they fire a bolt of light right at the camera to obliterate any photograph Color me skeptical. Does it detect the lens in the eye too? And then? Does it obliterate my retina when I look at his yacht?
  - bonestamp2 8y ago
    If you've got a CCD in your eye then ya, I'd be concerned about that.

cwkoss 8y ago

I have heard stories of feds coming out to stop people taking pictures of federal buildings. Always assumed it was security policy, but would be funny if it was just, "Damnit that guy is making this alarm go off non-stop, Dave, go get him to move along"

rococode 8y ago

Not a technical explanation but a story about a similar thing: https://www.wired.com/2009/09/russian-billionaire-installs-anti-photo-shield-on-giant-yacht/ https://www.wired.com/2009/09/russian-billionaire-installs-a... I remember this article as the first time I learned that photo-taking can actually be detected. Given that it was written in 2009, I imagine that the general camera-detecting technology has been mostly figured out by now.

Antonio123123 8y ago
So when it detects a lens, it shoots light to destroy the photo. If the detection is not ideal, it could detect eyeglasses and shoot light into people's eyes