ISO-Auto and fixed exposure

[mantelknopf]

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Hi,

 

I wonder how the M9 works in the following situation:

Exposure is set on A. ISO-Auto is switched on. Now I change the Exposure to a fixed value (500). What ISO does the M9 choose?

Thanks for your help!

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[Bart D]

What would be needed to give a 'correct' exposure for 1/500 with the aperture set on the lens.
Starting from the lowest iso value.

[mantelknopf]

Thank you! I thought it remains with the lowest ISO value. Means you have to switch off ISO Auto if you would like to underexpose!

[Bart D]

Indeed, I see no other option either.

[AceVentura1986]

Given that the M9 sensors are all ISO invariant, I see no benefit in using auto ISO while shooting in raw format. Why give up control to the camera when a simple slider command in Lightroom will yield similar or even better results? FWIW, i shoot between ISO 400 and 1600, ISO setting above that is easily set in Lightroom. 

[mantelknopf]

Just for a beginner: You mean it is better to underexpose deliberately and push the exposure in Lightroom giving better results than push ISO in camera?

Thank you!

 

[jaapv]

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That depends on your postprocessing skills.