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D850 ISO issues


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4 replies to this topic

#1
AlexG

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I have been experiencing worst than expected performance of the camera sensor.

Where on overcast day (but not that bad) at f/5.6 and 1/2000 requires ISO above 5000. (I would expect 3200 at most)

Or a poorly lit indoor portrait at f/5.6 requires ISO above 20,000 at 1/160 (I would expect no more than 10,000)

Is there a way to check against a benchmark of what expected ISO is in different light conditions?
If the camera is indeed underperforming, is it a sensor issue? What options do I have?

#2
Nikon Shooter

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Should I conclude you're on Auto ISO?



#3
mikew

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I have been experiencing worst than expected performance of the camera sensor.

Where on overcast day (but not that bad) at f/5.6 and 1/2000 requires ISO above 5000. (I would expect 3200 at most)

Or a poorly lit indoor portrait at f/5.6 requires ISO above 20,000 at 1/160 (I would expect no more than 10,000)

Is there a way to check against a benchmark of what expected ISO is in different light conditions?
If the camera is indeed underperforming, is it a sensor issue? What options do I have?

Are the exposures giving correctly exposed files, if so then you need to consider the exposure triangle and drop your shutter speed or open the arpeture to lower the iso.



#4
Bengan

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On what do you base your expectations? To me those values don't look off and your expectations are no more than one step off. As Mike posted, drop your shutter speed or open the aperture to decrease the ISO.



#5
AlexG

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Thanks all!

Yes I am in auto iso starting at 64, maxing at 20K.

My expectations were mostly based on experience shooting with the camera and lense.

I was traveling recently and noticed “higher ISO” then I would have expected. Was worried I had damaged the camera.

If those sound reasonable then maybe I am overly concerned for no good reason.

I am wide open given my lense and at min shutter speed given subject. It just feels less light is hitting the sensor than I would expect, but again to your point just “gut feeling” expectations are probably worthless.

Is that even a possible problem to have?
Can two same model bodies be hit by different light amount if one has a “defect”?