Kan en lære noe via EXIF-data?

En diskusjon på Photo.net om bilder tatt av ingen ringere enn Annie Lebovitz, for den amerikanske kleskjeden GAP, gjorde meg nysgjerrig...

I wanted to find out how the Leebster decided to light her subjects, and so I went to the GAP's web site, where they have all of the images (in 1300x1800 resolution) that you can download. My goal was to find reflections in the eyes, etc. that might tell me how many lights she used, how she modified the light, etc.

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The EXIF info shows that these images were shot using a Phase One P30 back on an unknown camera model. The most surprising thing to me was that some of the images list the camera as a Canon EOS-1Ds Mark II. So if the metadata is accurate, she shoots both 35mm and medium format, both digital of course.

For the 35mm stuff, she appears to shoot with a focal length from around 50mm to 85mm depending on her subject. f/13.0 is the common aperture value. ISO 100 is universal across all of these images; sRGB is the color space recorded from the camera.

EXIF Viewer leser ut følgende fra bildet ovenfor:

File name: SARAH_SILVERMAN.jpg
File size: 383750 bytes (15360x10240, 0.0bpp, 1230x)
EXIF Summary: 1/180s f/13.0 ISO100 46mm

Camera-Specific Properties:
Equipment Make: Canon
Camera Model: Canon EOS-1Ds Mark II
Camera Software: Adobe Photoshop CS2 Macintosh

Image-Specific Properties:
Image Width: 15360
Image Height: 10240
Number of Bits Per Component: 8, 8, 8, 8
Compression Scheme: Uncompressed
Pixel Composition: Unknown
Image Orientation: Top, Left-Hand
Horizontal Resolution: 300 dpi
Vertical Resolution: 300 dpi
Image Data Arrangement: Chunky Format
Image Created: 2007:07:30 13:05:12
Exposure Time: 1/180 sec
F-Number: f/13.0
Exposure Program: Manual
ISO Speed Rating: 100
Lens Aperture: f/13.5
Exposure Bias: 0 EV
Metering Mode: Partial
Flash: No Flash, Compulsory
Focal Length: 46.00 mm
Color Space Information: sRGB
Image Width: 1315
Image Height: 1810
Rendering: Normal
Exposure Mode: Manual
White Balance: Manual
Scene Capture Type: Standard

Other Properties:
Number of Components: 4
Resolution Unit: i
Exif IFD Pointer: 308
Compression Scheme: JPEG Compression (Thumbnail)
Horizontal Resolution: 72 dpi
Vertical Resolution: 72 dpi
Resolution Unit: i
Offset to JPEG SOI: 1090
Bytes of JPEG Data: 3144
Exif Version: 2.20
Image Generated: 2006:05:18 13:56:57
Image Digitized: 2006:05:18 13:56:57
Meaning of Each Comp: Unknown
Shutter Speed: 1/181 sec
Focal Plane Horiz Resolution: 3526 dpi
Focal Plane Vert Resolution: 3528 dpi
Focal Plane Res Unit: i