WOW what a game changer A7s

Started Apr 6, 2014 | Discussions thread
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D Cox
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Re: WOW what a game changer A7s
In reply to Ontario Gone, Apr 7, 2014

Ontario Gone wrote:

neil holmes wrote:

No, 12mp is fine for intended high ISO use.....the A7 is great at ISOs like 6400 and even 12800 but this will be much better still. People who want the res can have the A7R (which is better at high ISO than 95% of cameras anyway...this is for people who want the highest (currently).

ISO performance at common ISO shouldn't change too much.

Assuming that by "ISO performance" you mean noise levels, how much is "too much"?

I get the feeling you are suggesting that the lower resolution will specifically make noise performance better. It won't. Noise performance is about total light gathered, and the A7/r and A7s gather the same amount of light. Perhaps with a newer sensor they may have tweaked something minor, but it will be just that, minor.

Noise levels depend on pixel size, so at the same size of sensor and the same ISO setting and the same lens, the lower resolution will give less noise.

From Sony's press release:

"With a 12.2 effective megapixel count the size of each individual photoreceptive site is significantly boosted to increase their light-gathering power. Coupled with the camera’s powerful BIONZ X processing engine, this reduces image noise while increasing effective sensitivity range of the α7S"

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