What’s not so easy to see is the fact that a camera can have better input than its output, meaning the resulting digital image is actually lesser than the actual information captured by the camera; but a camera can never have better output than its input. That is to say, rubbish-in, rubbish-out. If your camera does not capture good information for processing, it does not matter how good the conversion of information into digital image will be.
The quality of the data captured by your camera is actually dependent on its sensor chip. The sensor chip is a device that converts light signals into electrical signals for photos to be processed into digital images.
While it may come as a surprise to you, but you can actually get better photos from an 8-megapixel camera than an 10-megapixel camera. The number of pixels does help in determining image quality, but it is not all there is to image data. Image data includes other factors like colour, highlights, shadows, all which are captured within the sensor. To be able to gather more information on the picture that it is being taken, the physical size of the sensor matters. The larger the sensor, the more information it can capture. This additional information gives the photos more ‘life’, realistic details, better colour and vibrancy. This is exactly the case when you sometimes compare photos and feel that one could be a lot more captivating despite the fact that both are the same picture but on different cameras.
The number of pixels does help to define the image, but if each pixel of the 8-megapixel camera records less information than each pixel of the 10-megapixel camera, it is possible that the image could turn out better in the camera with fewer megapixels.
But this doesn’t mean you must always go for the camera with larger sensors. Larger sensors necessary means a larger camera size, and at the same time, the improved colour and details in your photos are not easily noticed using the naked eye. Besides, many cameras today uses other technologies to optimise the image, by editing colour hue, brightness and other factors of the picture after the photo has been taken.
However, if you belong to the group of photography lovers who are against editing your pictures artificially with computer programs, then you may want larger cameras with higher megapixels and large imaging sensors.