[Leica] IMGS: Tests with MM and M246

[hlritter at bex.net (Howard Ritter)]

Thanks, Peter. Please see my reply to Jay, whose post I read just a couple 
of messages before I saw yours.

Apparently LR and Preview are privy to the sensor information, though they 
clearly handle it in different ways. Now I understand.

?howard


> On Feb 11, 2016, at 11:16 PM, Peter Klein <boulanger.croissant at 
> gmail.com> wrote:
> 
> Howard: There is a little round sensor on the upper front area of the
> digital Ms. The camera compares the amount of light this sensor receives
> with the amount of light the main sensor receives though the lens, and
> comes up with an estimated f-stop based on the difference.  Like any
> metering system, it can be fooled if the area measured and averaged is not
> actually average (e.g. a high contrast scene).
> 
> Leica has said that they don't consider the information accurate enough,
> which I assume is why they don't put it in the standard EXIF field for the
> f-number. Instead, it goes in the manufacturer's proprietary area. Some RAW
> image editors see and transfer it to that standard field, and some don't.
> There may be some difference in how the various editors interpret the
> information, or how Leica derives it based on coding or manual entry.
> 
> What I don't understand is why Capture One displays my M8's estimated
> f-numbers, but not my (MM) Monchrom.
> 
> --Peter