Re: Measuring accuracy of camera time codes

From: Marco Langbroek (marco.langbroek@wanadoo.nl)
Date: Tue Jun 02 2009 - 18:59:35 UTC

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    In my experience, the time in the EXIF usually relates to the time of the 
    shutter press (this also means it is not the same as the actual start of the 
    exposure).
    
    *However*, the internal clocks of camera's have a very fast drift (usually 
     >>1s/day) so this time is never very reliable. The only good time management 
    when using a DSLR, is to note down the time of shutter release yourself, using 
    an accurate, synchronized clock (and note: not a pc clock, as those aren't quite 
    accurate either).
    
    - Marco
    
    -----
    Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
    e-mail: sattrackcam@wanadoo.nl
    
    Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
    Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
    SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html
    Station (b)log: http://sattrackcam.blogspot.com
    -----
    
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