JEITA CP-3451 - 34 - ExposureBiasValue The exposure bias. The unit is the APEX value. Ordinarily it is given in the range of –99.99 to 99.99. Tag = 37380 (9204.H) Type = SRATIONAL Count = 1 Default = none MaxApertureValue The smallest F number of the lens. The unit is the APEX value. Ordinarily it is given in the range of 00.00 to 99.99, but it is not limited to this range. Tag = 37381 (9205.H) Type = RATIONAL Count = 1   Default = none SubjectDistance The  distance  to  the  subject,  given  in  meters.  Note  that  if  the  numerator  of  the  recorded  value  is  FFFFFFFF.H, Infinity shall be indicated; and if the numerator is 0, Distance unknown shall be indicated. Tag = 37382 (9206.H) Type = RATIONAL Count = 1 Default = none MeteringMode The metering mode. Tag = 37383 (9207.H) Type = SHORT Count = 1 Default = 0 0 = unknown 1 = Average 2 = CenterWeightedAverage 3 = Spot 4 = MultiSpot 5 = Pattern 6 = Partial Other = reserved 255 = other LightSource The kind of light source. Tag = 37384 (9208.H) Type = SHORT Count = 1 Default = 0 0 = unknown