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."
The basic concern is that smaller pixels on camera sensors means less sensitivity to
light, leading to image noise such as off-colour 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.

full article by Stephen Shankland
at
http://www.cnet.com.au/digitalcameras/cameras/0,239036184,339273472,00.htm



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