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More megapixels, better photos: Fact or fiction?

Digital camera makers continue to squeeze ever more megapixels into their products. But does that make for better pictures?

Some experts say no. Image quality isn't improving, they say, and some fear it may actually be degrading as the megapixel race escalates.

"There is definitely a decrease in image quality," said Dave Etchells, editor of a camera reviews Web site, the Imaging Resource, which performs extensive camera tests. "There have been some improvements in semiconductor process technology for sensors, so it's mitigated the problem a bit, but there overall has been an increase in image noise."

Planet82 has the answer with a chip that's supposedly 2,000 times more sensitive to light, and 50 percent smaller than current CMOS and CCD sensors.
The basic concern is that smaller pixels on camera sensors means less sensitivity to light, leading to image noise such as off-color speckles or rough edges, worse performance in dim conditions, and the loss of finer tonal gradations such as the subtle shadows of a white wedding dress. Point-and-shoot cameras, with their small sensors, are the chief culprits.

Camera makers disagree, saying consumers have an appetite for higher-resolution images--for making larger prints or cropping to focus on specific details--and that image quality has indeed improved overall. But even if they're correct, they have a growing perception problem among influential camera experts and enthusiasts.

Some of the blame can be laid at the feet of consumers, who fixate on megapixels as a measure of quality. It's the same thing that happened with PC processor megahertz and flat-panel TV dimensions. "The word 'megapixel' is a marketer's dream. Every consumer believes more is better," said Chris MacAskill, chief executive of SmugMug, a Web site that hosts photos and lets users print them.

"The trouble is megapixels stopped mattering once we passed 6 of them," MacAskill said. "One in a million shots would benefit from more than 6 megapixels, while every indoor shot would benefit from less noise."

 

 

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