JEITA  CP-3451 - 31 - SubsecTimeDigitized A tag used to record fractions of seconds for the DateTimeDigitized tag. Tag   = 37522 (9292.H) Type = ASCII N = Any   Default = none Note−Recording subsecond data (SubsecTime, SubsecTimeOriginal, SubsecTimeDigitized) The tag type is ASCII and the string length including NULL is variable length. When the number of valid digits is up to the second decimal place, the subsecond value goes in the Value position. When it is up to four  decimal  places,  an  address  value  is  Interoperability,  with  the  subsecond  value  put  in  the  location pointed  to  by  that  address.  (Since  the  count  of  ASCII  type  field  Interoperability  is  a  value  that  includes NULL, when the number of valid digits is up to four decimal places the count is 5, and the offset value goes in the Value Offset field. See section 2.6.2.) Note that the subsecond tag differs from the DateTime tag and other such tags already defined in TIFF Rev. 6.0, and that both are recorded in the Exif IFD. Ex.: September 9, 1998, 9:15:30.130 (the number of valid digits is up to the third decimal place) DateTime 1996:09:01 09:15:30 [NULL] SubSecTime 130 [NULL] If the string length is longer than the number of valid digits, the digits are aligned with the start of the area and the rest is filled with blank characters [20.H]. If  the subsecond data is unknown, the Interoperability area can be filled with blank characters. Examples when subsecond data is 0.130 seconds:   Ex. 1) '1','3','0',[NULL] Ex. 2) '1','3','0',[20.H],[NULL] Ex. 3) '1','3','0', [20.H], [20.H], [20.H], [20.H], [20.H], [NULL] Example when subsecond data is unknown: Ex. 4) [20.H], [20.H], [20.H], [20.H], [20.H], [20.H], [20.H], [20.H], [NULL] G.    Tags Relating to Picture-Taking Conditions ExposureTime Exposure time, given in seconds (sec). Tag = 33434 (829A.H) Type = RATIONAL Count = 1 Default = none FNumber The F number. Tag = 33437 (829D.H) Type = RATIONAL Count = 1 Default = none