Archived posting to the Leica Users Group, 2005/04/10

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Subject: [Leica] For B.D.
From: phong at doan-ltd.com (Phong)
Date: Sun Apr 10 18:40:19 2005

Richard wrote:
> Something doesn't jive about this - the DigiluxII's sensor is
> smaller than  the 4/3 sensor. I think it's just over 1" in diagonal
> (I'm sure less lazy people than I can find it on the dpreview site).
> So if the digilux's pics  are better, than it has to be either
> - better lens
> - better software

It's not so simple; to say that a larger sensor is necessary
better than a smaller one is almost as naive as saying that
more megapixels is better.

For example, the Canon 1Ds (version 1) has a big sensor,
but the image quality at high ISO/longer exposure is not as good
as, say the Canon 20D.  One reason for this is because the CMOS
chip used in the 20D consumes less power and generates
less heat than the CCD sensor on the D1s.   Heat is a noise
generator for the sensor.     (To optimize image quality on
your digital digital camera, don't use the preview screen much !)

The comparison in discusssion is a "system"
comparison, from which conclusions about separate
components are not always valid.

My humble, biased opinion

- Phong




Replies: Reply from bdcolen at earthlink.net (B. D. Colen) ([Leica] For B.D.)
Reply from joseph at yao.com (Joseph Yao) ([Leica] For B.D.)
In reply to: Message from richard-lists at imagecraft.com (Richard) ([Leica] For B.D.)