ISO variance and the Z8 - interesting info

[aringer]

I came across this interesting info on ISO, so I'm sharing. According to Photons to Photos website, the Z8 has the same ISO performance between ISO 500-2000 as it does from ISO 100-400. The black line is my old D4. It's worth testing on our own.

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[bleirer]

That looks like the dual gain sensor so many modern cameras are using these days. My R5 has a very similar profile, where it's better to jump to 400 iso if not using base ISO.

 

[John Navitsky]

yes, it is a dual gain

 

[arbitrage]

Dual-gain sensors have pretty much been the norm for the past 5 years or more on all the higher end bodies.

Except on rare occasions when I want to shoot at base ISO (64 or 100 depending on the camera), I always treat the dual gain ISO as my base ISO...go down to that ISO as light allows and then just up my shutter speed as I get more and more light.

It is always wise when you get a new camera to research the dual gain ISO value.

Some examples:
Z9/Z8: ISO 500
D500: ISO 400
D850: ISO 400
A9/A9II: ISO 640
A7RIV/V: ISO 320
A1: ISO 500
R3/R5: ISO 400

 

[Anthony]

Dual-gain sensors have pretty much been the norm for the past 5 years or more on all the higher end bodies.

Except on rare occasions when I want to shoot at base ISO (64 or 100 depending on the camera), I always treat the dual gain ISO as my base ISO...go down to that ISO as light allows and then just up my shutter speed as I get more and more light.

It is always wise when you get a new camera to research the dual gain ISO value.

Some examples:
Z9/Z8: ISO 500
D500: ISO 400
D850: ISO 400
A9/A9II: ISO 640
A7RIV/V: ISO 320
A1: ISO 500
R3/R5: ISO 400

Z7II ISO 400.

 

[NorthernFocus]

Yes for action photography it makes no sense at all to shoot at anything below ISO500. For auto ISO shooters that should be set as the low limit. A @arbitrage said if you bump against it is easily taken care of by increasing ss.