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 Width553 pixels
Exif Image Height400 pixels
Color SpacesRGB
CompressionJPEG (old-style)
User Comment


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Bowdoin Street 1
We look across Bowdoin Street, on the south side of the intersection. The main actuator loop is mostly after the stop bar, and the bicycle symbol is only partly inside the loop. As with all the loops, sealing compound was applied after the paint; here, the compound partly obscures the bicycle symbol. Though the compound will probably wear away fairly quickly, its being applied over the paint suggests that the saw cuts in the pavement for sensor wires were made after the symbol was painted. To assure that the symbol will be in the right location, either painting must be done last or there must be a precise plan. There was none here.
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Photos and captions by John S. Allen
unless otherwise indicated.