DUAL GAIN sensors ...

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PhotoTeach2 Forum Pro • Posts: 14,324
DUAL GAIN sensors ...

In a recent thread an OP stated that he was using ISO-320 ... it was pointed out that his specific camera had a dual gain at ISO-400, and thus (ISO-400) would be less noisy.

Is there a list or another way to know which cameras have dual-gain sensors, and exactly what ISO's the change (increased gain for less noise) happens ???

Austinian
Austinian Forum Pro • Posts: 13,383
Re: DUAL GAIN sensors ...
3

PhotoTeach2 wrote:

In a recent thread an OP stated that he was using ISO-320 ... it was pointed out that his specific camera had a dual gain at ISO-400, and thus (ISO-400) would be less noisy.

Is there a list or another way to know which cameras have dual-gain sensors, and exactly what ISO's the change (increased gain for less noise) happens ???

I think Bill Claff's PDR charts (for one) show that; for example, the A7RIV goes dual-gain at ISO 320. See the kink at ISO 318:

https://www.photonstophotos.net/Charts/PDR.htm#Sony%20ILCE-7RM4

I don't know of a specific list of dual-gain-sensor cameras.

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bclaff Forum Pro • Posts: 13,753
Re: DUAL GAIN sensors ...
6

Austinian wrote:

PhotoTeach2 wrote:

In a recent thread an OP stated that he was using ISO-320 ... it was pointed out that his specific camera had a dual gain at ISO-400, and thus (ISO-400) would be less noisy.

Is there a list or another way to know which cameras have dual-gain sensors, and exactly what ISO's the change (increased gain for less noise) happens ???

I think Bill Claff's PDR charts (for one) show that; for example, the A7RIV goes dual-gain at ISO 320. See the kink at ISO 318:

https://www.photonstophotos.net/Charts/PDR.htm#Sony%20ILCE-7RM4

I don't know of a specific list of dual-gain-sensor cameras.

Yes, although it's more obvious on the Read Noise in DNs chart, for example:

You could also scroll through the table under the Sensor Heatmap page.
HCG is High Conversion Gain.

Regards

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Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

spider-mario
spider-mario Senior Member • Posts: 1,030
Re: DUAL GAIN sensors ...
1

My favourite page for that purpose is the input-referred read noise page since, for a given amount of light, it shows directly what we are interested in (read noise in image-relative units).

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Iliah Borg Forum Pro • Posts: 29,366
That's dual conversion gain, DCG
1

Or you are risking to mess things up, like it happened with exposure, lightness, brightness, dynamic range, and even with aperture. With pretty much everything...

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