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OK, I'm fully convinced the A1 performs far better than the HC1 in low light.
Alex, you report a patterning of out-of-focus objects in the HC1. I don't think this is due to a "sharper lens than sensor"-effect. In high-frequency parts (fine texture, like in a tweed jacket) of the image, "aliasing" will appear if the sensor resolution is lower than the optical resolution. However, this applies to in-focus objects and the aliasing will vanish as the object moves out of focus. Maybe you see an effect of the compression algorithm(?). In any case, your observation is very much appreciated! As for the CMOS vs CCD comparison, which perhaps is sliding away a bit from the original topic, I am all ears/eyes for any improvements of the dynamic range. Moving from good-old film into video has been painful regarding this. |
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I've attached an image. You'll need to open it to full size to see the noise.
If you look at the trees in the background you see a kind of patina over the out-of-focus parts of the image. It looks almost like it was shot through a bug screen (it wasn't - that's clear air between the camera and the background). I remember reading somewhere what caused this - and I seem to recall the suggestion that the lens was too good for the camera (the pattern you are seeing is something to do with the sensor array)... but I may be recalling that wrong. Anyway, however it's created, it's there. |
Thanks, Alex, for that illustration. Very clear distortion of the background, indeed. It is very similar to image processing induced artefacts I've seen in highly compressed airborne surveillance images. I would place a little bet on the compression after all.
However, what's interesting is, as you say, it's there! So this is a typical HVR-A1/HC1 behaviour that is not seen with the Canon XH A1? Then Canon scores one more point with me... |
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You'll avoid this moire pattern with any 3 chip camcorder, Sony, Canon, Panasonic, JVC et al |
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