Is there any loss of IQ when using ISO 50 on d600?

Started Oct 7, 2012 | Questions thread
DPFranz Veteran Member • Posts: 3,569
Re: Is there any loss of IQ when using ISO 50 on d600?

Talkontar wrote:

Particularly, is DR compromised? If yes, how big is the difference - 1 stop or less? If no, why ISO 50 is not base ISO? I've never used ISO 100 on my d300 to avoid losing DR. Is d600 different in the way how ISO 50 is achieved then d300? So far I don't see difference in JPEG OOC, but since DxO support is not yet available I haven't yet make comparisons with RAW myself.


If memory serves, ISO 50 is just an ISO 100 shot where the output values are divided by two. So the DR in the highlights is reduced by a stop. Worded another way, you will lose the highlights that you would lose if you exposed for the same time with the same aperture at ISO 100. I believe it's  really just a shortcut to lowering the exposure slider by a stop in your RAW converter. Perhaps it's not this simple; if so, I'm sure I'll be corrected. :~D

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Dana Paul Franz

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