Posted by ken On March 25th, 2008
Last week I had an interesting discussion with a guy about camera sensor resolutions. He was surprised that I currently shoot with an 8 megapixel camera. His point was that point and shoot cameras can be purchased with similar resolution. He was apparently under the impression that sensor resolution was the primary indicator of digital image quality.
With many point and shoot cameras, their manufacturers sell resolution as a means of comparing different models. They basically say that higher resolution is always better. Consumers need to understand that resolution is only one component of image quality. However, there are several other factors that are equally important. For instance, the camera’s lens quality may play larger part in the overall sharpness of an image. If the lens doesn’t project a sharp image to the sensor, then your image quality will suffer regardless of the resolution. So a high megapixel sensor with a poor lens will just get you a larger crappy image. You are usually better off going with a camera that uses a better lens, even if the resolution is less.
There are other more technical factors that also affect image quality. You also have the sensor’s ability to render accurate colors, the size of the pixels, the physical size of the sensor, and many other more complex factors.
For most of my work I use Canon “L” lenses. There are Canon’s highest quality, professional lens and they really produce some amazing images. I have produced composite photos as large as 20×30 inches that look really great. So if you are thinking about buying a new digital camera, be sure to look at all factors that impact image quality, not just resolution.