antdickens 0 Posted March 21, 2005 Has anyone used these meters which givbe you a reading of how well the camera is focused. I have been advised to use one instead of the little portable tft screen as they give better results. Share this post Link to post Share on other sites
VST_Man 1 Posted March 21, 2005 The Camera Master is a digital, hand-held, battery operated meter that measures five different characteristics of the video signal from a CCTV camera or other video source, namely: SYNC (40 IRE Units) Enables the camera to be set to the correct video output level. WHITE (100 IRE Units) Enables the camera Iris to be accurately adjusted to the correct brightness setting. COMPOSITE (140 IRE Units) Measures overall level of the video signal. 140 IRE Units = One Volt Peak to Peak. COLOR BURST (40 IRE Units) Measures color burst amplitude on the Back Porch of video. Used to adjust cable equalizers to offset cable slope loss. FOCUS Used to adjust camera for best focus on scene. Maximum meter reading occurs at sharpest focus. No need for a TV monitor at the camera location. The Sync, White, and Composite amplitude measures the sync- to-white ratio and the overall video waveform amplitude on any part of an NTSC or PAL video system, including camera origination, video levels in Distribution Amplifiers, TV Switchers, Studios, Microwave and Satellite transmission systems. The small size of the Camera Master enables it to be taken directly to the camera location, thus saving time and in many cases, reducing test and installation manpower. do a web search and you will find it. nice to have but not necessary. your money. Share this post Link to post Share on other sites
kaysadeya 0 Posted March 22, 2005 Yes, it seems a bit expensive. But I guess if you're wearing coke bottles (like me ) and you're also a pro trying to focus dozens of cameras a day in precarious locations, it may be worth the money. Share this post Link to post Share on other sites
Cooperman 0 Posted March 22, 2005 The only slight problem with using a 'focus meter' is that whenever you need to set a lens focus to an abstract point (to make best use of the available depth of field), the unit will be fooled by the largest 'sharp' object, and not necessarily the point you actually want. Sometimes too much technology can end up doing your head in! Share this post Link to post Share on other sites
