In the digital environment, an image’s resolution is governed simply by the number of photosites or pixels sited on the sensor: the greater the number of pixels, the more detail the sensor is capable of capturing.
However, it’s important not to think of resolution as the defining factor in image quality, as more pixels don’t necessarily make for a better image. It’s the quality of the pixels that count, and not the quantity.
Camera sensor technology has evolved to such a point that today, most DSLRs are capable of producing high-quality tabloid- or A3-sized prints; and for the vast majority of us this is quite sufficient. However, for some this is still not quite enough, and so we need to be aware of what the limits are—and which ...