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Originally Posted by Yandros With small sensor compact cameras, in general if you increase the number of pixels, you increase the noise. As each light sensitive site is slightly smaller, less light falls on it, so your signal to noise ratio gets worse. You'll also find that the resolving power of the sensor will exceed the resolving power of the optics on cheap cameras.
So, you end up with a bigger image that actually has no more real detail than the smaller equivalent. This is the great megapixel con that the marketing departments are inflicting on us. It's the same idiotic ploy that PC manufacturers have used for years. PC box shifters sell on the CPU speed, and totally ignore the subsystems like graphics cards.
The difference between 6 and 7 MP is tiny. Certainly 6MP is fine for A4, and seem to recall someone saying recently that it'll be ok for A3 as well. |
This info is 100% right. The most important factor, when it comes to image quality, is the size of the sensor, and cramming more minaturised pixels on to a physically small sensor is counter-productive.
If you want better image quality, go for a DSLR, which has a much larger sensor than any point and shoot - and forget about the number of pixels.
FWIW, the difference between 6 & 7MP is almost impossible to measure in real terms. If you wanted double the resolution of a 6MP camera (and had the corresponding increase in sensor size to make use of it) you would need to have 24MP