What, Me Worry? wrote:
> "MarkČ" <mjmorgan(lowest even number here)@cox..net> wrote in message
> news:tQA3h.2711$...
>> What, Me Worry? wrote:
>>> Has anyone else here tried or bought the new Canon Digital Elph
>>> SD900? I recently bought one on sale ($399 at Dell.com), and I'm
>>> interested to see what others think about the camera. I'm having
>>> trouble finding any discussions about this new flagship Elph camera,
>>> and reviews are scarce.
>>> I bought the SD900 to replace an S400 that has served me well.
>>> Those are my first impressions. Anybody else have opinions to share
>>> about this camera?
>>
>> 10MP is just WAY too high to be useful for such a tiny sensor.
>> 6MP is about all I'd want to try and eek out of anything that
>> small...
>
> Not sure I'm understanding your response here. Are you suggesting
> that having more native pixel resolution is not useful?
>
> FYI: The 10 megapixel CMOS image sensor in the SD900 is physically
> larger than the 7.1MP CCD found in the SD800 IS. The lens is
> proportionately larger as well.
As you stuff more and more pixels into small sensors, you necessarily
increase noise.
And...as you stuff those pixels in, you reach a point where the lens is
unable to resolve detail to take advantage of the sensor resolution. David
Littlewood or Roger Clark could get into the numbers/math to back this
up...but basically you get to a point of severely diminishing returns...not
to mention unnecessarily-bloated file sizes. The huge pixel counts in these
TINY sensor cameras is all about marketing, and not much else. Don't get me
wrong... There IS a place for high pixel counts. My 5D has 12.8
megapixels...but you could likely fit 6 or 8 of your sensors onto the 5D's
sensor, size-wise (don't know the exact dimensions of the SD900, but it's
relatively tiny).
I own and use the SD700IS, and think it does OK...for a dinky little camera.
But even at its modest 6MP, the noise is very pronounced at even ISO 200 or
400, where my 5D is nearly noise-free up to ISO 800. ISO 1600 on my 5D is
better than my 700IS at 400. -Heck...it's not even close.
So...basically I am suggesting that you will gain very little true DETAIL in
your photos with that 110MP sensor. You'll get noise (which can sometimes
give the ILLUSION of detail) and bloated file-sizes. -Not much else.
--
Images (Plus Snaps & Grabs) by MarkČ at:
www.pbase.com/markuson