en.wikipedia.org

File:GWR Cooke and Wheatstone double needle telegraph instrument.jpg - Wikipedia

  • ️Mon Apr 13 2009

This is a file from the Wikimedia Commons

From Wikipedia, the free encyclopedia

File:GWR Cooke and Wheatstone double needle telegraph instrument.jpg

Original file (1,366 × 1,366 pixels, file size: 358 KB, MIME type: image/jpeg)

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current17:38, 3 March 2024Thumbnail for version as of 17:38, 3 March 20241,366 × 1,366 (358 KB)Geof SheppardLarger copy
07:04, 28 August 2009Thumbnail for version as of 07:04, 28 August 2009768 × 768 (151 KB)Geof Sheppard{{Information |Description={{en|1=An early double-needle telegraph of the Cooke and Wheatstone pattern used on the pioneerimg telegraph routes of the Great Western Railway in England. On display at the National Railway Museum.}} |Source=Own work by uploa

The following 4 pages use this file:

Global file usage

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Camera manufacturerCanon
Camera modelCanon PowerShot G7
Exposure time1/60 sec (0.016666666666667)
F-numberf/2.8
Date and time of data generation15:49, 13 April 2009
Lens focal length7.4 mm
OrientationNormal
File change date and time15:49, 13 April 2009
Y and C positioningCentered
Exif version2.2
Date and time of digitizing15:49, 13 April 2009
Meaning of each component
  1. Y
  2. Cb
  3. Cr
  4. does not exist
Image compression mode3
Shutter speed5.90625
APEX aperture2.96875
Exposure bias0
Maximum land aperture2.96875 APEX (f/2.8)
Metering modePattern
FlashFlash fired, compulsory flash firing
DateTimeOriginal subseconds00
DateTimeDigitized subseconds00
Supported Flashpix version1
Color spacesRGB
Focal plane X resolution12,710.801393728
Focal plane Y resolution12,725.581395349
Focal plane resolution unitinches
Sensing methodOne-chip color area sensor
File sourceDigital still camera
Custom image processingNormal process
Exposure modeAuto exposure
White balanceAuto white balance
Digital zoom ratio1
Scene capture typeStandard