General info:
ModelCanon PowerShot A570 IS
MakeCanon
Basic shot info:
Focal Length5.8 mm; equivalent: 29 mm
Aperture ValueF2.6
White BalanceAuto white balance
FlashFlash did not fire, auto
Metering ModeCenter weighted average
Shutter Speed Value1/25 sec
ISO Speed Ratings1600
Advanced shot info:
Exposure Bias Value0 EV
Exposure Time0.04 sec
Exposure ModeAuto exposure
Max Aperture ValueF2.6
Exif-related info:
Exif Version2.20
Exif Image Width400 pixels
Exif Image Height513 pixels
Color SpacesRGB
CompressionJPEG (old-style)
User Comment


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New Chardon Street 1
Looking east across New Chardon Street, with Cambridge Street in the background, August 8, 2008. Traffic-signal actuator loops have been newly installed, and they are of a type that can sense bicycles. That's good, but there are quality-control issues. The bicycle symbol in the foreground is supposed to indicate where bicyclists are to wait in order to trigger the signal, however, the symbol is not directly over one of the wires. I have not yet tested whether detection is achieved here.
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Photos and captions by John S. Allen
unless otherwise indicated.