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Juan Martinez

Basic Member
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    2
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Profile Information

  • Occupation
    Industry Rep
  • Location
    New Jersey Highlands
  • My Gear
    Sony: F950, F23, FS5, FS7, F5, F55
  • Specialties
    Senior Product Manager -retired-
  1. Hi, the image above is a classic example of chromatic aberration, a lens issue that manifest as green-magenta "fringing"on high contrast transitions. Use an appropriate HD lens to correct this issue.
  2. Juan Martinez

    XDCAM EX

    Hello, I work for Sony and have been involved with EX development from its inception more than three years ago. The EX1 is accepted by many broadcasters such as CNN, Discovery, Nat Geo and many more. Ex is very well suited for shooting with available light because it has a very wide angle true HD lens. This lens does not exhibit ramping (does not loose a stop, or more when you zoom all the way in) and it has three 1/2 inch full raster HD CMOS sensors providing very high sensitivity, exposure latitude and signal to noise ratio. EX camcorders record full raster 1080 i/P or 720p signals into SxS cards that plug directly into new Mac or Pc for transferring data at very high speed (8GB in about 3.5 min). The 35Mbps full raster codec are supported by all major NLE (including Avid). Don't be fooled by the numbers game. 4:2:2, 3:1;1, 4:1:1 and 4:2:0 have absolute meaning in SD, but NOT in HD. In SD, the luminance signal always has 720x480 pixels (for NTSC). However, many HD formats record deprecated luminance frames (the recorded frame has less pixels than the native HD signal). In these cases the sampling numbers only depict the relative ratio of color to luminance samples. So it is possible for a marketing person to call 4:2:2 a format that records 720P at 920x720 instead of 1280x720 or 1080 at 1280x1080 instead of 1920x1080. Thus, it's impossible to compare formats based on "relative" numbers. To make an accurate comparison it is necessary to define a common base, lets say that 4 will be only used to depict full raster HD frame 1920x1080 or 1280x720. In this case, Ex is 4:2:0 at both 1080 and 720 modes and the other format is 3:1.5:1.5 and 2.6:1.3:1.3 respectively. Always count the pixels!!! In conclusion, not only does the EX 35Mbps codec have higher (true HD) resolution, but when capturing for editing the NLE will not need to rescale the images. No scaling artifacts! I hope you find this information helpful. Juan Martinez Senior Manager, Technology Sony Electronics Inc.
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