Need some help figuring out what this is...

Discussion in 'Chit-Chat' started by JayBird, Jun 1, 2018.

Share This Page

  1. JayBird

    JayBird n3wb

    Joined:
    Mar 24, 2018
    Messages:
    3
    Likes Received:
    8
    Got the last of the new cameras installed, this one's been up about a week now (IPC-HFW5231E-Z5E ) and I have 2 issues that may be related.
    First is this spec that is visible at night, pics are zoomed all the way in then zoomed all the way out for reference.
    Second is that when the camera is zoomed all the way in, when it switches to night mode, auto focus de-focuses the image. I'm not sure if this spec has anything to do with it or not but to get it focused, I have to manually move the focus slider full left with the zoom slide full right. I hope that makes sense.

    [​IMG]

    [​IMG]
     
  2. bigredfish

    bigredfish Known around here

    Joined:
    Sep 5, 2016
    Messages:
    1,039
    Likes Received:
    814
    Location:
    Florida USA
    That spec looks to me to be something reflective of IR on the road. It doesnt appear to be with the lens..

    As to the focus issue, welcome to my (and others) world. The auto-focus on the Z5/Z12 goes out of focus when switching from color to B&W. This is particularly problematic and seems to become worse as the lens is more zoomed in. It makes using these for LPR a real problem.

    There is a 3rd party script that can be run on another machine that will help correct this, (search for Sunrise/Sunset utility) but for now at least, Dahua seems to not want to allow disabling of auto-focus which would be a simple fix to the problem.
     
    JayBird likes this.
  3. TheDank

    TheDank Getting the hang of it

    Joined:
    Jan 5, 2017
    Messages:
    30
    Likes Received:
    26
    Location:
    SF Bay Area, California
    Could the weird speck just be lens flare from that bright light?
    You might be able to test that by blocking it with something and see if it goes away.
     
    looney2ns and JayBird like this.
  4. bigredfish

    bigredfish Known around here

    Joined:
    Sep 5, 2016
    Messages:
    1,039
    Likes Received:
    814
    Location:
    Florida USA
    Ahhh good catch @TheDank - it could well be reflection from that little sign to the left by the pole...
     
  5. TheDank

    TheDank Getting the hang of it

    Joined:
    Jan 5, 2017
    Messages:
    30
    Likes Received:
    26
    Location:
    SF Bay Area, California
    BigRedFish beat my suggestion by a few moments...
    I was thinking reflection by something on the road also, but then I noticed that the speck looks like it's roughly located directly across the center of the image from the bright light. Maybe. Blocking the bright light from hitting the camera will be a good test. If it's still there, then I'd go with something reflective on the road. It's not very far, you could go out to that location and see what it is.
     
  6. JayBird

    JayBird n3wb

    Joined:
    Mar 24, 2018
    Messages:
    3
    Likes Received:
    8
    Well you guys are quick and good! Here's what I found. Mystery solved! Thanks...now to get my pellet gun out and take care of a light!...JK.

    [​IMG]

    [​IMG]
     
  7. TheDank

    TheDank Getting the hang of it

    Joined:
    Jan 5, 2017
    Messages:
    30
    Likes Received:
    26
    Location:
    SF Bay Area, California
    Wow, JayBird, that was the perfect way to do it, watching on your phone so that you could get your hand in the perfect spot to block the light. Good job!
     
  8. bigredfish

    bigredfish Known around here

    Joined:
    Sep 5, 2016
    Messages:
    1,039
    Likes Received:
    814
    Location:
    Florida USA