Lightroom 3 Estimating Aperture . . .

[Guest Ming Rider]

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I've noticed since getting my new M8 (new to me) that Lightroom 3 is now showing the Aperture used for each shot in the EXIF.

 

This never happened with my old M8 in Lightroom 2. The only differences are that I'm now using LR3 and the firmware is 2.005. My lens, a Voigtlander 35mm f2.5 isn't coded.

 

Also if I open old files from my previous M8, it doesn't show the f-stop either.

 

Strange??

[stunsworth]

To see the estimate in the older photographs you need to resync the exif data. From memory you can see the relevant option if you right click on a thumbnail.

 

The information has always been there, but wasn't shown in LR2.

[Guest Ming Rider]

Thanks Steve. I've resync'd the pictures and yes, they all show the aperture. Amazing.

 

Is this one of the jobs of the famous `blue dot` on the front of the camera?

 

Kev

[wstotler]

Is this one of the jobs of the famous `blue dot` on the front of the camera?

 

It's a happy side effect. The blue dot feeds the camera's processor exposure information to help it make internal decisions about which image correction settings to apply to the raw sensor output when it's manufacturing the DNG. The blue dot's information is logged into the EXIF.

 

You can see all of the information available (blue dot exposure, TTL exposure, etc.) here:

http://sites.google.com/site/cornerfix/using-cornerfix/leica-specific-information

 

Lightroom is taking several of these pieces of data and guessing.

 

Thanks,

Will

[CharlesL]

If you run the DNG through Adobe DNG Converter to get another DNG, it will also guess the f-stop. The output file is considerably smaller than the input file, and I have not noticed loss of quality.