A57 or A65 for lowlight wildlife?

Started Oct 28, 2012 | Questions thread
theswede
theswede Veteran Member • Posts: 4,009
Re: A57 or A65 for lowlight wildlife?
3

sensibill wrote:

The A57 is less noisy at high ISO even normalized. Fact. End of discussion.

Except that's in disagreement with the facts. "Noise" is not the same as "chroma noise", or every camera maker would just gaussian blur everything and everyone would be overjoyed at the amazing IQ. Since that's not so, that tells us something.

Namely that the opposite of "noise" is "signal". The measurement of noise is called SNR. Signal to noise ratio. That is how noise is measured. Not by shrill 16MP apologists shouting down anyone with their chroma noise fixated subjective analysis and links to uncontrolled test images.

And here we have the signal to noise ratios:

Thus, at the end of all this, the noise is the same. Unless of course you make the common mistake of thinking "noise" and "chroma noise" are the same thing. But I wouldn't think anyone who has spent some time researching these matters would make such a basic mistake.

Jesper

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