Base ISO

[ldhrads]

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I'm sure this has been asked and answered somewhere, but I've searched and can't find.  I know that the base ISO on my M9 is 160, what is it on the M10-P? 

 

Thanks

 

Lawrence

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[Kwesi]

I believe its also 160. Making 200 the default base ISO for the M10/P.

ISO 100 is considered a "pull"

[a.noctilux]

My supposition, never found from some right source.

Simply 200 ISO, if it's the same as M10.

Considering it was 160 ISO but not easy to set if not in the menu.

As 100 ISO is  kind of "pull" in my use since early 2017, I'd say base ISO160 or 200 not really different.

ISO 200 is the most use and when I use at ISO 100, I've found shorter dynamic and not better noise.

[adan]

Somewhere around 135-150 - even Leica (Stefan Daniel) was not very specific when asked. For all variants of the M10 (-P, -D, etc.)

100 is a definite "pull" - overexposed and corrected in the camera processing. Risks blown highlights, but has less-noisy shadows

200 is a slight "push" - slightly better retention of highlights, but also slightly noisier.

It was discussed at length 2 years ago, just after the M10 intro. Leica originally allowed Auto ISO to select down 100, but changed the base of Auto ISO to 200 at some point with new firmware.

It has been a point of contention that there is no way (dial, menu, Auto) to actually select the true Base ISO.

Although to my thinking, setting 100 or 200 and then exposing for 135 or 160 (100 underexposed .3-.7 stops, or 200 overexposed .3 or .7 stops), and just brightening or darkening a touch in post-processing, amounts to the same amount of light and same amount of brightness as being able to set "135" or "160" in the first place.

Edited August 7, 2019 by adan

[ChicagoMatthew]

6 minutes ago, Kwesi said:

I believe its also 160. Making 200 the default base ISO for the M10/P.

ISO 100 is considered a "pull"

+1 

[adan]

Sorry - I thought this link had been added to my previous post - but must have made a mistake

 

 

[jonoslack]

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Hi There

Andy has it, it's around 160

I spent a lot of time and effort looking at this and I wrote a story about it here which may be of interest:

The M10 and Blown Highlights (and base ISO)

All the best

 

[ldhrads]

1 hour ago, jonoslack said:

Hi There

Andy has it, it's around 160

I spent a lot of time and effort looking at this and I wrote a story about it here which may be of interest:

The M10 and Blown Highlights (and base ISO)

All the best

 

Thanks Jono, appreciate your work!