File:Didcot disc and crossbar signal.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	08:08, 1 December 2009		768 × 1,024 (170 KB)	commons>Geof Sheppard	{{Information \|Description={{en\|1=A Great Western Railway disc and crossbar signal at Didcot Railway Centre, England. This early form of mechanical signal was rotated to show one of two aspects to on coming trains. The disc represents 'all right' and the

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Camera manufacturer	Canon
Camera model	Canon PowerShot G7
Exposure time	1/160 sec (0.00625)
F Number	f/8
Date and time of data generation	12:19, 24 May 2009
Lens focal length	14.783 mm
Orientation	Normal
File change date and time	12:19, 24 May 2009
Y and C positioning	Centered
Exif version	2.2
Date and time of digitizing	12:19, 24 May 2009
Image compression mode	3
APEX shutter speed	7.3125
APEX aperture	6
APEX exposure bias	0
Maximum land aperture	3.34375 APEX (f/3.19)
Metering mode	Pattern
Flash	Flash did not fire, compulsory flash suppression
Color space	sRGB
Focal plane X resolution	12,710.801393728
Focal plane Y resolution	12,725.581395349
Focal plane resolution unit	inches
Sensing method	One-chip color area sensor
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Digital zoom ratio	1
Scene capture type	Standard