Pixel density revisited

Started Oct 22, 2008 | Discussions thread
bobn2
bobn2 Forum Pro • Posts: 61,144
Re: Pixel density revisited

Jonathan Demarais wrote:

bobn2 wrote:

Jonathan Demarais wrote:

Phil Askey wrote:

Did you read the rest of the review? The original point was that the
pixel density figure provided in the specs database should not be
used as a predictor of image quality alone.

So lets draw a line. What pixel density, given current sensor
quality, what is the highest pixel density where you can stiil get
reasonably good images?

I'm not sure that the position of this limit has been definitively
defined yet. If you look at this thread from John Sheehy:
http://forums.dpreview.com/forums/readflat.asp?forum=1018&thread=28607494&page=1
You will see a demonstration that the 1.97um pixels from a Panasonic
FZ40 outperform on an area for area basis the pixels from a Canon
40D. That's a pixel density of 26 MP/cm². If you made a FF sensor
form those pixels it would have 222MP, and you could extract a pretty
decent image from it.

Complete with a beltpack 260G hard drive to hold the images!

Couple of years time you'll get 260G on an SD!

More seriously, capturing the image with that resolution doesn't mean you are forced to store it at that resolution, and remember, the size of each sample would be smaller. I haven't done the sums, but a camera such as that might operate perfectly satisfactorily with an 8 bit ADC or smaller.

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Bob

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