Re: DV100 vs DNxHD vs CFHD

The lens has to act as an anti-alias filter, so that the image sampled by the CCD doesn't alias and create artifacts. For pixelshift to work, you need to create some aliassing so that it can be anti-aliassed as more real detail is created by the pixelshift algorithm. I'm guessing that Panasonic will make the lens just good enough for the CCD to function properly, and that to keep sensitivity of the chips up, they won't have any more pixels than they need, and so the camera won't generate any detail beyond what the codec is capable of, and hence capturing the image uncompressed ahead of the codec won't add in any extra detail save reducing any artifacts from the codec. If they were to put a "better" lens on the camera, and the chips were high enough resolution for full raster, there is a point whereby the lens would be too good for the chips and produce aliassing artifacts which would be objectionable. It is the camera designers' job to balance these factors for an intended result.

Capturing uncompressed on F900 or Varicam makes sense as the chips are more detailed than the codec allows, hence the codec can deal with super-sampled information, and the lens choice would be made so that it works with the chips and resolution detail of the camera, not limited by the codec.

Graeme

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