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Bob Atkins knows what he's talking about when it comes to digital photography tips and so when he publishes a new article I always check it out. His latest on Digital Sensor Size is well worth the read. It examines the important topic of the size of your digital camera's sensor - a vital component in the equation to getting a quality results from your digital images.
'There's a lot of attention paid in the digital camera world to pixel count. Cameras are often categorized by the number of pixels they have in their image sensor. However not all pixels are equal and, as in many contexts, size matters!
In this article I'm going to take a look at several digital cameras with different physical sensor sizes but all with a nominal 3 megapixel (3MP) pixel count. A standard 35mm frame is 36mm x 24mm, so lets call that “full frame”. As you can see from row #1 in the table, all the cameras listed here have sensors smaller than a “full frame sensor”. Just looking at the “short” side of the sensor compared to the “short” side of the 35mm frame we can see that the Canon D30 sensor (which is the same size as the sensor in the EOS D60, 10D, 300D and 20D) is 0.63x full frame, the Nikon Coolpix 995 0.22x full frame and the Minolta Xi sensor is 0.167x full frame. You can see the difference in relative sensor size from the figure below. It's pretty dramatic!'
Posted by Darren in our Tips category on January 04, 2005