Jump to content

jmk

Members
 View Profile  See their activity

  • Content Count

    17

  • Joined

  • Last visited

Posts posted by jmk

  2. Posted

    Hi,

    I have a PTZ camera (Eversecu) at our gate about 500 feet from the house and it works great. However it is very visible at night because of the 850 IR's and I would like one with 950 IR's so that it's not so obvious to people. My gate and property is at the end of a dead end road out in the country. I just don't want it so obvious.

    I've contacted Eversecu (thru Amazon) and haven't heard anything yet.

    I'm just researching my options.

    Thanks again for your reply.

  3. Posted

    Thanks for the reply.

    I know the 950's reduce the range and that's not a problem. However, I don't know what or where the filter is and I'm clueless about the smart IR. Can you enlighten me?

    Thanks again

  5. Posted

    I'm looking at CCTVCAMERAPROS 16 channel hybrid dvr (http://www.cctvcamerapros.com/960H-Surveillance-System-DVR-p/idvr-pro16a.htm) to replace my Qsee 5716. I like the fact that they have a lot of mobile and pc support software (apps) since I use the PC and iphone & ipad a lot. I have a variety of camera makes, ptz and fixed. I'm getting really confused with all the makes and suppliers out there. Any help would be appreciated.

    Thanks in advanced.

  7. Posted

    Goal

    To read a license plate at 80 feet including at night, it can be done. So the final result should be able to focus in on an area about 10 feet wide for a vehicle entrance/exit.

     

    Lens

    At 80 feet, this means about a 38mm-42mm lens on the camera for a 10 foot wide view. Going to a 20 foot wide view means about an 18mm-20m lens.

    But those higher zoom lens cost monayyy!

     

    Two sites to play with (I'm not affiliated with either one):

    Simple field of view calculator:

    https://www.pelco.com/partners/tools-calculators/camera-lens-field-of-view-calculator-fov

     

    Another calculator, but with a "simulator." This one has a "Vehicle Entrance" example...choose that, then change the "Viewable Dimensions" setting down below to 10, 20, or 30 feet to get a general idea of the field of view (but not necessarily the resolution).

    http://polarisusa.com/pvi4

     

    So a camera such as the Hikvision's DS-2CD2T42WD with a 12mm lens, it's within the price range, but even getting a 12mm lens on it, you're looking at a view that is about 30 feet wide...that's like 3-4 cars lined up next to each other...good enough for reading a license plate? Maybe at 4MP...maybe...in the daytime.

     

    As mentioned above, a varifocal camera that has 12-50mm lens would let you choose the exact field of view you wanted.

     

    Resolution/high-def

    Most of the cameras for everyday use are typically 2.8mm-4.0mm. Going to a higher resultion camera such as 3 or 4 megapixel will help quite a bit...but not enough for an 80foot shot of reading the plate number.

     

    Night time

    Not making this easy on the cam, are we...hehe.

    IR does work, but range is limited. And even then, we simply don't get as good of detail when compared to daytime. Such is the technology in 2015. But we only need it to read the plate numbers. Many times the camera will say it has an IR range of 100 or 160 feet. Typically in real-world use, I find about half their claimed distance is more usable.

     

    Thanks for the info, this helps me a lot.

    I can deal with the 850nm ir"s instead of the 940's.

    I found this camera on ebay. Is this something that would work? http://www.ebay.com/itm/LPR-License-Plate-Camera-Professional-Recognition-1-3-Sony-CCD-6-60mm-Zoom-Lens/181455649502?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D33097%26meid%3De8b688af3bb3448b96579d43a37e25af%26pid%3D100005%26rk%3D4%26rkt%3D6%26sd%3D190843835824

  8. Posted

    I'm not using any lens

     

    Your camera MUST have a lens on it, is it a fixed or vari-focal lens? If it is fixed, what are the specs? If it is vari-focal what is the the range of focal length? What is the F-stop number?

     

    Is your problem with 850 the red glow? At 80 feet no one will even see it.

     

    No offense, but I think you are reading my question wrong. I don't have a lpr camera yet. I'm in the market for one and am getting really confused with all the "specs" on them. My biggest concern, besides price, is that I need 80 feet distance.

  9. Posted

    I'm not using any lens, I'm looking at license plate capture cameras and really getting confused with all the different ones out there. It will be mounted 8 feet off the ground and needs to see 80 feet or more.

     

    What would be a decent lcp camera for my purpose? I need the 80 feet and would like to keep the price down. I could live with 850nm.

  10. Posted

    Does anyone make a security camera to read license plates (image only) that uses 940nm ir's? I have found a number of cameras that will show plates but they are either 850nm leds or don't give any specs on the wave length. I would like to keep the cost around $300 or less. Distance I need is about 80 feet.

    Thanks

  13. Posted

    you could simply use the spare cable to switch a relay at the gate - that way you can pick up the supply locally at the gate and run the power through the relay contacs and use a simple 12v psu at the house to switch the relay coil via the spare cat 5 wires.

    this will save costs on bulky psu's

    don't have to worry about frying the cables then, sometimes old tech works.

     

    I like your suggestion of a relay, however my electronic skills are very limited, so I have no idea what parts I would need to do that. A parts list and wiring diagram would be greatly appreciated (if you would be so kind).

     

    Also, I want to turn the camera and dvr off because I don't really need it on all the time.

     

    Thanks for the reply's.

  14. Posted

    I have a PTZ IR camera about 700 to 800 feet from my house to our gate. I have cat5 cable 24awg (4 twisted pairs) in conduit to the camera. I'm using 2 for video, 2 for PTZ and the rest for power. Of course it's to far for the power supply I have. Camera is 12vdc and 20w (1.66a?). The power supply is 12v 2a. I don't want to power the camera at the gate, because I would like to turn it off from the house. I have power at the gate. Unfortunately I can't run anymore or larger cable.

     

    I'm considering using this power supply (http://www.powersupplydepot.com/36-Volt-Power-Supply,-4-2A,-150W,-Switching,-Hengfu/16034-PS/) at the house and then this (http://www.ebay.com/itm/COP-Security-15-AC24-2A-15-AC24-2A-AC-DC-AC24V-to-DC12V-Converter-Box-NEW-/111271023193?pt=LH_DefaultDomain_0&hash=item19e8451259) at the camera.

     

    Will this work or am I crazy? I don't want to burn up the camera.

    Any suggestions would be great.

  16. Posted

    I have a Sony 700tvl ptz camera. In the manual under the auto tracking settings for "sensitivity" it says: "set the speed dome camera running angle during tracking, the value larger then the tracking angle much larger". The settings are numbers 1 -8. I'm sure that it's translated to english, however I'm really confused about the statement of running angle. Can anybody explain to me what they are talking about?

  17. Posted

    I am new to using PTZ cameras and am confused about some of the settings and how they work or what they mean.

    The first question I have is about the ir led settings. There is a led on value and and a led off value of 0-255. It is a threshold value. I have no idea what that relates to and have been unable to find anything by searching the net.

    Then there is a "bright mode, such as PAMAS". I have no clue what PAMAS is or the "bright mode 0-255" means.

    The camera is the same as a "700TVL SONY CCD 10x ZOOM Waterproof High-Speed Mini PTZ Camera IR 60m".

    Any help or where I can find information on this subject would be appreciated.

    Thanks

×