Anyone getting Aperature info from EXIF on M8?

[MP Guy]

I jut noticed this today from a photo I took over the weekend.

Photo 3 of 9
Children's Mass
Apr 22, 2007
934×639 pixels – 359KB
Filename: Mass4.jpg
Camera: Leica Camera AG
Model: M8 Digital Camera
ISO: 320
Exposure: 1/180 sec
Aperture: f/2.560852
Focal Length: 90mm

 

[jaapv]

No- the M8 lists no aperture used. The aperture as determined by the camera is deemed to be too inaccurate to be used for EXIF.

 

[MP Guy]

This one is from the 24.

Filename: Mass8.jpg
Camera: Leica Camera AG
Model: M8 Digital Camera
ISO: 320
Exposure: 1/45 sec
Aperture: f/6.961117
Focal Length: 24mm

 

[dazedgonebye]

Just curious...
Is the aperture listed a calculation based on shutter speed and "correct" exposure?

 

[scho]

This one is from the 24.

Filename: Mass8.jpg
Camera: Leica Camera AG
Model: M8 Digital Camera
ISO: 320
Exposure: 1/45 sec
Aperture: f/6.961117
Focal Length: 24mm

I never shoot jpegs so I've not seen aperture reported in exif data for DNG files. Which firmware were you using?

 

[MP Guy]

I shoot all in DNG and convert to JPG for web posting. Using the latest firmware downloaded a week or so ago.

 

[Nemo]

What software do you use?

 

[JeremyR]

Just curious...
Is the aperture listed a calculation based on shutter speed and "correct" exposure?

How could the camera possibly know the "correct" exposure? Unless it has an additional, non-TTL meter, it cannot "see" the actual EV of a scene; it can only see what light is passed through an aperture of unknown size.

Cheers,
Jeremy

 

[rvaubel]

How could the camera possibly know the "correct" exposure? Unless it has an additional, non-TTL meter, it cannot "see" the actual EV of a scene; it can only see what light is passed through an aperture of unknown size.

Cheers,
Jeremy

But it does have an additional non-TTL meter. It's in the "blue dot". The camera has to be able to figure the approximate aperture in order to implement the vignetting and cyan correction in the software. Leica could report this F number in the EXIF data if they wanted to. I sure wish they would.

Rex

 

[JeremyR]

But it does have an additional non-TTL meter. It's in the "blue dot". The camera has to be able to figure the approximate aperture in order to implement the vignetting and cyan correction in the software.

Indeed it does. If Leica engineers are able to relatively accurately estimate the lens aperture using such a device to measure EV (especially considering the varying angle of view of different lenses), then color me impressed!

Cheers,
Jeremy

 

[robg]

Any disparity is likely due to the fact that the blue dot has a far wider FOV than most lenses. It is like the different between spot and ambient metering. It is a shame there is no EV EXIF field (or is there?)