Too many megapixels? Six is enough for an 8x10.

Started Apr 26, 2009 | Discussions thread
RedFox88 Forum Pro • Posts: 29,085
Re: they go hand in hand!

Oly Canikon wrote:

RedFox88 wrote:

Oly Canikon wrote:

Why does the 50D have more noise than the 30D? The sensor size didn't
change but the pixels got a lot smaller. Even compare the d3 vs. the
d3x. d3 is cleaner and the sensor size didn't change, but obviously
the pixels had to get smaller to fix twice as many in!

The 50D doesn't have more noise than the 30D.
I stated before that there are many design factors that change along
with the number of pixels so these comparisons fall apart. The D3 and
D3x are optimized for different purposes but the noise levels aren't
all that different.

Tell that to the DPR review team. Their reviews show the 40D has more
noise than the 20/30D, and the 50D has more noise than the 40D. Some
users say the 50D has less noise than the older advanced amateur
camera line but are they being fooled by noise reduction? Other
users say 50D has more noise.

See the latter half of this page, it shows the d3x with notable more
noise than the d3

The test methodology is flawed. They are comparing different size
crops. See below.

Lol, why don't you leave DPR on their feedback function if you think they are so wrong. Maybe they'll hire you to do their testing.

And you can't go from a 10MP 1/1.8" sensor to a 10MP 1/2.5" sensor
without also making the pixels smaller!

Can't argue with that. But what exactly does it prove?

You said it's the smaller sensor adding the noise not the smaller
pixels, but you can't have the above situation without also making
pixels smaller! Smaller pixels see less light (spreading the light
over smaller observable units).

You have smaller pixels each gathering less light but more of them so
you are back where you started. The same amount of light falls on a
given area. That area just happens to be divided into smaller parts.
The only reason you might have less light overall is with loss in the
gaps but with gapless microlens that isn't an issue.

Now if you look at the individual pixel you will see more noise. But
why would you do that? When you increase the number of pixels it
doesn't automatically mean you have to print bigger. It means you get
better quality with the same print size.

It's obvious there's no getting through to you. Good luck with that.

No reason to expect more noise. It just means that you average more
sensor pixels to make a dot on the final print. The amount of light
that makes up that dot is the same. So the signal to noise has to be
the same.

Again you feel you know more than this site that does about the more in depth analysis of digital cameras for 10 years now. Another armchair camera tester.

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