More megapixels, better photos: Fact or fiction?

Started Feb 7, 2008 | Discussions thread
John Sheehy Forum Pro • Posts: 21,712
Re: Correction

misha marinsky3 wrote:

For what it's worth, I take IR shots with a 2.1 MP Oly 2000, and a
Hoya R72. I can make nice 8.5x11s with it. How many diodes do you
need for that or 11x14? How many 11x14 enlargements did anyone make
from a 35 negative?

You're putting all your eggs in the enlargement basket. Enlargement is not the issue. If you want to make bigger images, stitch, stack, or get a bigger sensor. The issue being discussed here is pixel density in a fixed sensor size, in terms of noise and accurate detail.

And then there is enlargement software.

They all basically try to make it look like the image isn't enlarged, but that's not the same thing as actually having real detail.

The more diodes on a given
size chip, the faster you reach dimishing returns. Simple physics.
Something else: in order to doube the resolution, you have to
quadruple the diodes.

Yes; that's a basic aspect of 2-dimensional media. It has its storage and speed costs when it gets into higher resolution.

One of the greatest benefits of oversampling the optics (and that means 2x for Bayer CFAs) is that the data is extremely flexible, and can be resampled, rotated, and corrected for geometric distortions, far more accurately, and with minimal artifacts.

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John

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