A57 or A65 for lowlight wildlife?

Started Oct 28, 2012 | Questions thread
philbot Contributing Member • Posts: 846
Re: A57 or A65 for lowlight wildlife?

sensibill wrote:

It's been said, 'Never underestimate the power of denial.'

Chroma noise is still noise.

The A57 has a chroma noise advantage at higher ISO. This also results in more accurate shadow colors at high ISO.

I don't know if you are deliberately 'blind' to such blindingly obvious differences between the files..

If you look at the Chroma information in each image, using DPReviews studio comparison tool (to ensure no claims of bias either way), you can see startling differences.

Obviously, I agree, the difference in chroma noise is very much evident, but that's not the only obvious difference.

Look how overall, the A57 colours are much more muted.. the Chroma 'signal' is very much boosted (as is the noise) in the A65..

Now, the first thing that happens when applying Chroma NR is colours become less saturated.. odd that, with the A57 looking less saturated in the comparison tool..

The reason that the A65 cleans up identically to the A57 is simple, the A65 may have more chroma noise, because it has more chroma signal..

Here's ACR's efforts side by side with Chroma NR On/Off.. it actually does a good job at retaining colour fidelity whilst markedly removing the chroma noise.. if you compare it to the A57 image, it has virtually identical detail which ever way you measure it, which can only mean that somewhere along the line (in-camera or in-ACR) the A57 just gets given more Chroma NR.. it certainly has no more signal

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