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rikky

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Posts posted by rikky


  1. depends on your application.

    CCD's are widely used and are available in different flavours and prices on the market. Still CCD is the best choice for low light environments.

    What they mostly lack is Wide dynamic range possibilities.

     

    Therefore CMOS chips are being used to have pixel per pixel analysis, and able to cope with WDR situtations.


  2. agree with the +'s as mentionned.

     

    On the - side, you should take into account that most baluns don't have AGC build-in, leaving you in many cases with a video signal which is out of balance, meaning no 1Vpk, deformed sync puls and colour burst.

    This can result in the DVR not willing to take the video signal into account.

     

    Therefore the best is still to have a scope on-site, in order to be able to tweak the video signal with the potentio meters build-in the active receivers.


  3. Hi CCTV_donw under,

     

    As I'm reading your paragraphs on the Bosch cam's, you mention on the backfocus that you can switch this on the camera without using a ND filter.

    So far so good, as this feature is also available on other cameras.

     

    Adding up to that you mention that there are even no screws. Does this mean you set the backfocus completely vie PC, without going out there at the camera?


  4. coming back on the Bosch discussion, it's indeed correct that the XF is a real camera show case.

    Although a camera can be too complicated and expensive if you'd compare it to the standard cameras available on the market.

     

    In this case, where we are talking on standard light conditions for interior use, it's still to prove that the Bosch camera will perform much better than the price and feature list pretend.

    It can even become too complicated. As different technicians are even not interested in having PC-setup cameras, because 1) not all of them have got a laptop available 2) the more features available, the more things can go wrong.

    So that's why still so many dip-switch cameras are being sold in the market today, for a fast and easy job.


  5. had similar effects - monitors going black when using switchers.

    This happened years ago, when LCD's weren't yet that common and technology not yet that good performing.

    I was told that if the camera inputs on the switcher are not synchronised you'll always have this kind of effects.

    Only it will be less visible on tube screens as the switching is faster than on LCD screens.

    Can anybody confirm on this??


  6. important is to define with your customer the specific field of view he wants to obtain. It's common that gas station-owners want to have it all with only 1 camera, meaning an overview of all lanes + the license plates of the different cars.

    As stated already above, beware that each application requires specific cameras / lenses.


  7. Got a special request for a customer willing to see 1km away.

    Some 'googling' showed me the Extreme GVS1000.

    Do you guys have any interesting experiences or alternatives for such a project.

     

    Thanks,

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