TALKIN’ ’BOUT A RES­O­LU­TION

WHY THE NUM­BER OF PIX­ELS QUOTED FOR A CAM­ERA DOESN’T AL­WAYS HAVE A CORRELATION WITH HOW ‘GOOD’ THE END IM­AGE IS

Australian T3 - - STATE OF THE ART -

Just go­ing by spec­i­fi­ca­tion, the 24megapixel res­o­lu­tions of­fered by the Canon and Fuji cam­eras on test here would seem to out-gun the Olym­pus’ rel­a­tively hum­ble 16.1 megapixels. But, of course, that’s only if we’re play­ing the num­bers game. Pix­els aren’t ev­ery­thing, be­cause the abil­ity of the lens in use to re­solve all that in­for­ma­tion, and the phys­i­cal dimensions of the sen­sor onto which light is di­rected, also play their part. The Canon and Fuji of­fer larger APS-C-sized sen­sors, as typ­i­cally found in DSLRs, while the Olym­pus uses the smaller Four Thirds type. But if us­ing a smaller chip, cram­ming less pix­els onto it makes sense, be­cause over­crowd­ing can lead to vis­i­ble im­age grain or ‘noise’ the darker the shoot­ing con­di­tions get.

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