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Canon XH Series HDV Camcorders
Canon XH G1S / G1 (with SDI), Canon XH A1S / A1 (without SDI).


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Old June 28th, 2009, 09:57 PM   #16
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Ken - I waded in on this issue elsewhere - some thinking was along the lines that the zoom range on many of these lenses is just too high - resulting in very complex optical design that even the best fluorite and/or ED elements can not correct for.

As an example - my DSLR Canon L glass delivers stunning images - WAY WAY beyond the current HD 1920 x 1080. The zoom range though is 70mm - 200mm - 1.5x or something compared to the HD video lens at 20x......
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Old June 29th, 2009, 09:39 AM   #17
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Of all the cameras I own, my XHA1 gives by far the most CA. Basically ruins everything shot with it in my opinion. My Sony Fx1 typically has about half as much or less. My $600 Samsung HMX20 seems to have essentially no CA. Perhaps it runs some digital filter internally to automatically remove any. Some newer still camera do exactly that.

Cheers,
Anna
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Old June 29th, 2009, 09:46 AM   #18
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i use a Canon 17-85 lens on a DSLR which is a little notorious for CA and wonky barrel distortion, but i think its flexibility is more important than the effect of CA at the wide end, which i really don't notice that much (plus, i LIKE wonky)...
in Adobe camera raw, there are ways of dealing with CA and barrel distortion in a still picture, and then saving a profile for the lens... not sure if there is such a thing for video.
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Old July 14th, 2009, 03:43 PM   #19
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Can't help thinking this is a pretty minor problem that the vast majority of people will NEVER notice especially if the composition of the shot is good enough - something that often gets neglected with all these technical quibbles.
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