Progress is still being made in sensor design. Later designs are
quieter and the built in noise reduction less obtrusive. The new 7MP 1
1/8 inch sensors with smaller pixel sites are less noisy than the older
8 MP sensors with larger sensors. There is not much difference at all
between new 8MP sensors and the 5 or 6 MP sensors that preceded them.
DC Resource does not use an objective measure of noise, just a
subjective judgment based on a night shot. dpreview has objective
measurements.
The quietest example in each category is cited below. There is a graph
at the bottom of each page. In each category there are popular and
capable cameras with much higher noise levels.
1. 7MP 1 1/8 inch with lower noise than 5MP 1 1/8 inch sensor(Luminance
noise 2.2 to 3.5 ISO 100 to ISO 400)
http://www.dpreview.com/reviews/canong6/page14.asp
2. 8MP Canon DSLR sensor equal to or lower noise than 6MP Canon DSLR
sensor.(luminance noise 1 to 1.5 ISO 100 to ISO 400)
http://www.dpreview.com/reviews/canoneos20d/page20.asp
3. 8MP 2/3inch sensor (Luminance noise 2.0 to 4.3 ISO 100 to ISO 400)
http://www.dpreview.com/reviews/olympusc8080wz/page15.asp
4. 5MP 2/3 inch sensor(Luminance noise 2.1 to 3.5(ISO 100 to ISO 400)
http://www.dpreview.com/reviews/minoltadimagea1/page16.asp
It is really difficult to generalize in this area.
Winsor
Long Beach, California, USA
On Jan 25, 2005, at 5:03 PM, Alienspecimen wrote:
>
>
> Speaking of noise...I have not forgotten that I owe you a link to the
> website that claimed the current 8MP sensors are noisier than the
> previous generation.
> I found it at work during a couple of slow days. Things have changed
> now and I don't have much time at all, so it may take a while.
> I am tempted to say it was dcresource.com. I remember that the site
> in question showed up when I did a search in google for the
> differences between A2 and A200.
> When it comes to the noise definition, they were talking mostly about
> the noise that shows up during night exposures.
> Boris
>
>
> Reason has always existed, but not always in a reasonable form.
>
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