[Leica] Monochrom metadata and uncoded lenses

[Frank Dernie]

The camera measures the difference between the light coming through the lens onto the exposure meter cells and the light impinging on the little frosted plastic window on front of the camera. It calculates from the difference what the aperture value must be. It is not spot on but good enough for record keeping.
Frank D.

> On 13 Feb, 2015, at 15:36, Lew Schwartz <lew1716 at gmail.com> wrote:
> 
> I understand ( or think I do) how my Monochrom can write shutter speeds -
> whether I'm using the auto setting or setting them manually -  into the
> metadata for each shot, but with uncoded lenses, where is the aperture
> setting data coming from? Is it anywhere close to being accurate or is it
> just arbitrary fallout from digital space?
> 
> 
> -Lew Schwartz
> 
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