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More detail about Watson thinking

Watson thinking by zorbadgreek

Taken on
March 13, 2008 at 11.16pm PDT

Posted to Flickr
March 16, 2008 at 10.20pm PDT



What is EXIF data?

Almost all new digital cameras save JPEG (jpg) files with EXIF (Exchangeable Image File) data. Camera settings and scene information are recorded by the camera into the image file. Examples of stored information are shutter speed, date and time, focal length, exposure compensation, metering pattern and if a flash was used.

Source: Digicamhelp.

spacer image
Camera: Canon EOS Digital Rebel XTi
Exposure: 0.05 sec (1/20)
Aperture: f/4
Focal Length: 28 mm
ISO Speed: 1600
Exposure Bias: 0/3 EV
Flash: Flash did not fire

Orientation: Horizontal (normal)
X-Resolution: 72 dpi
Y-Resolution: 72 dpi
Date and Time: 2008:03:13 23:16:35
YCbCr Positioning: Co-Sited
Exposure Program: Manual
Date and Time (Original): 2008:03:13 23:16:35
Date and Time (Digitized): 2008:03:13 23:16:35
Shutter Speed: 283242/65536
Metering Mode: Pattern
Color Space: sRGB
Focal Plane X-Resolution: 4433.295 dpi
Focal Plane Y-Resolution: 4453.608 dpi
Exposure Mode: Manual
Compression: JPEG
Image Type: Canon EOS DIGITAL REBEL XTi
Owner Name: unknown (
Camera Serial Number: 2021130468
Model ID: 2147484214
Tag::Canon::0x0013: 0, 159, 7, 112
Lens Type: EF-S18-55mm f/3.5-5.6
Internal Serial Number: H3333422
Tag::Canon::0x0098: 0, 0, 0, 0
Tag::Canon::0x00AA: 10, 947, 1024, 1024, 129
Color Space: 1
Tag::Canon::0x4008: 129, 129, 129
Tag::Canon::0x4009: 0, 0, 0
Custom Functions: 24, 0, 256, 512, 768, 1024, 1280, 1536, 1792, 2048, 2304, 2560
Image Width: 1280 pixels
Image Height: 853 pixels
Focal Type: Zoom
Scaled Focal Length: 28
Focal Plane Size: 907 x 605
Flash Guide Number: 100
Shutter Count: 36871
Color Temperature: 5200°K
Picture Style: Standard
Sensor Width: 3948 (52-3939 used)
Sensor Height: 2622 (23-2614 used)
Macro Mode: Normal
Image Quality: Fine
Continuous Drive: Single
Focus Mode: One-shot AF
Canon Image Size: Large
Easy Mode: Manual
Contrast: Normal
Saturation: Normal
Metering Mode: Evaluative
Focus Range: Not Known
Canon Exposure Mode: Manual
Lens Type: Canon EF-S 18-55mm f/3.5-5.6
Lens: 18 - 55mm
Max Aperture: 128
Min Aperture: 304
Flash Activity: Flash did not fire
Photo Effect: Off
Color Tone: 0
ISO: 1600
Measured LV: 4
Target Aperture: 22.62741699797
Target Exposure Time: 0.049606282874006
Focus Distance Upper: 0.46
Focus Distance Lower: 0.59
F Number: 4.2
Camera Type: EOS Low-end
Auto Rotate: None
Image Width: 3888
Image Height: 2592
Image Width (As shot): 3504
Image Height (As shot): 2336

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