using a resolution measurement in a way it is not meant to be used.
In reviewing Sony HD camcorders I see that the more you spend, the higher the effective and actual resolutions. But these are so much higher than HD resolution, I'm not sure what the point is. I guess that the more pixels that get sampled to produce the 1080p final pixel, the more accurate that pixel will be. But is there some way to understand "how much better 6 megapixels is to 3 megapixels"? Is this the same as comparing 3 and 6 megapixel still photos?