Is the A77 meant to be a low ISO camera

Started Jul 25, 2012 | Discussions thread
Contributing MemberPosts: 843
Re: Were you looking at the A77 to replace your Pentax K5
In reply to Clayton1985, Jul 26, 2012

Clayton1985 wrote:

or go along with it? Just wondering what made you look at the A77.

Here are a couple of shots showing the OMD's highISO noise performance vs the A77 (both are ISO3200). I know they aren't perfect but at least those wondering can get some idea. (The one that exhibits better high ISO performance was taken with the OMD).

If you post the exit of those images, you will find, as all the studio comparisons show, the OM D for the same scene and ISO will have metered such that it gets up to double the light.

you will find that to get comparable exposures, you can knock the A77 down up to 1 full stop in this particular case.

In other words, to get the same shutter/aperture settings and the same scene brightness, you would find the A77 needs ISO1600 to the OMDs ISO3200. Comparing at the same ISO is actually misleading since one would for example set the shutter speed for double the duration of the other camera to give the same scene.

This, and being fooled into pixel level vs image level noise and again doing a lob-sided comparison by only observing noise at 1:1 are the two biggest misunderstandings you see these days.

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