Comments on: Canon Flash EXIF http://brettgrossphotography.com/2009/01/13/canon-flash-exif A dozen dozen? Sat, 04 Feb 2012 18:53:53 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: brett http://brettgrossphotography.com/2009/01/13/canon-flash-exif/comment-page-1#comment-690 brett Wed, 31 Mar 2010 14:55:21 +0000 http://brettgrossphotography.com/2009/01/13/canon-flash-exif#comment-690 Thanks for finding that! Thanks for finding that!

]]> By: cglusky http://brettgrossphotography.com/2009/01/13/canon-flash-exif/comment-page-1#comment-689 cglusky Fri, 26 Mar 2010 19:14:06 +0000 http://brettgrossphotography.com/2009/01/13/canon-flash-exif#comment-689 You can grab the EXIF spec over here: http://www.exif.org/specifications.html And the Flash tag spec starts on page 35. But let me save you the time, unless you are really feeling Geeky: The spec uses hex to encode a 7 bit sequence used to describe flash activity. The list that Dr Bob gave above is the decimal conversion of the hex and looks to be how it sometimes gets stored in the file. Not sure that is always true, so if you ever run into a value in that field that does not match to the above list you can try converting it from hex to decimal and see what you get. R, Coby You can grab the EXIF spec over here:
http://www.exif.org/specifications.html
And the Flash tag spec starts on page 35. But let me save you the time, unless you are really feeling Geeky: The spec uses hex to encode a 7 bit sequence used to describe flash activity. The list that Dr Bob gave above is the decimal conversion of the hex and looks to be how it sometimes gets stored in the file. Not sure that is always true, so if you ever run into a value in that field that does not match to the above list you can try converting it from hex to decimal and see what you get.
R,
Coby

]]> By: Dr. Bob http://brettgrossphotography.com/2009/01/13/canon-flash-exif/comment-page-1#comment-657 Dr. Bob Sat, 02 Jan 2010 10:53:15 +0000 http://brettgrossphotography.com/2009/01/13/canon-flash-exif#comment-657 Here's what google spit out for the numbers in the flash field: "0" => "Flash did not fire.", "1" => "Flash fired.", "5" => "Strobe return light not detected.", "7" => "Strobe return light detected.", "9" => "Flash fired, compulsory flash mode", "13" => "Flash fired, compulsory flash mode, return light not detected", "15" => "Flash fired, compulsory flash mode, return light detected", "16" => "Flash did not fire, compulsory flash mode", "24" => "Flash did not fire, auto mode", "25" => "Flash fired, auto mode", "29" => "Flash fired, auto mode, return light not detected", "31" => "Flash fired, auto mode, return light detected", "32" => "No flash function", "65" => "Flash fired, red-eye reduction mode", "69" => "Flash fired, red-eye reduction mode, return light not detected", "71" => "Flash fired, red-eye reduction mode, return light detected", "73" => "Flash fired, compulsory flash mode, red-eye reduction mode", "77" => "Flash fired, compulsory flash mode, red-eye reduction mode, return light not detected", "79" => "Flash fired, compulsory flash mode, red-eye reduction mode, return light detected", "89" => "Flash fired, auto mode, red-eye reduction mode", "93" => "Flash fired, auto mode, return light not detected, red-eye reduction mode", "95" => "Flash fired, auto mode, return light detected, red-eye reduction mode" Here’s what google spit out for the numbers in the flash field:

“0″ => “Flash did not fire.”,
“1″ => “Flash fired.”,
“5″ => “Strobe return light not detected.”,
“7″ => “Strobe return light detected.”,
“9″ => “Flash fired, compulsory flash mode”,
“13″ => “Flash fired, compulsory flash mode, return light not detected”,
“15″ => “Flash fired, compulsory flash mode, return light detected”,
“16″ => “Flash did not fire, compulsory flash mode”,
“24″ => “Flash did not fire, auto mode”,
“25″ => “Flash fired, auto mode”,
“29″ => “Flash fired, auto mode, return light not detected”,
“31″ => “Flash fired, auto mode, return light detected”,
“32″ => “No flash function”,
“65″ => “Flash fired, red-eye reduction mode”,
“69″ => “Flash fired, red-eye reduction mode, return light not detected”,
“71″ => “Flash fired, red-eye reduction mode, return light detected”,
“73″ => “Flash fired, compulsory flash mode, red-eye reduction mode”,
“77″ => “Flash fired, compulsory flash mode, red-eye reduction mode, return light not detected”,
“79″ => “Flash fired, compulsory flash mode, red-eye reduction mode, return light detected”,
“89″ => “Flash fired, auto mode, red-eye reduction mode”,
“93″ => “Flash fired, auto mode, return light not detected, red-eye reduction mode”,
“95″ => “Flash fired, auto mode, return light detected, red-eye reduction mode”

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