[Thunar-dev] Image property: add Aperture (F Number) and ISO number?

[Xiong Jiang]

Looks like ApertureValue is F/FNumber. I think FNumber is more
popular. For example, from `identify -format '%[EXIF:*]' img.jpg`, I
only see FNumber=56/10 but no ApertureValue. This means the aperture
is F/5.6. (F is focal length here.)

Reference:
http://en.wikipedia.org/wiki/Aperture
http://en.wikipedia.org/wiki/F-number

>From http://www.exif.org/Exif2-2.PDF

ApertureValue
The lens aperture. The unit is the APEX value.

MaxApertureValue
The smallest F number of the lens. The unit is the APEX value.
Ordinarily it is given in the range of 00.00 to 99.99,
but it is not limited to this range.

It's great you add this. I'll try it if get some time.

Thanks,
Xiong

On 7/13/06, Benedikt Meurer <benedikt.meurer at unix-ag.uni-siegen.de> wrote:
> Xiong Jiang wrote:
> > Hi,
> >
> > Thunar is a great browser for us. Just a little request:
> >
> > Can you add Aperture (EXIF tag FNumber) and ISO number (EXIF tag
> > ISOSpeedRatings) in the <image> tab of file properties page?  These
> > two numbers are as important as Exposure Time, Focal Length for a
> > picture from digital camera and SLR.
>
> Attached is a patch to add "ISO Speed Ratings".
>
> I'm not familar with EXIF tags, can you probably outline the difference
> between "Aperture Value" (EXIF_TAG_APERTURE_VALUE) and "Aperture"
> (EXIF_TAG_FNUMBER)? Do we need both?
>
> > Thanks a lot,
> > Xiong
>
> Benedikt
>
>
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