Originally posted by Adam Great info! I'm sure the ExifTool will eventually be updated to support that tag. Phil pushes out updates pretty often.
A few months ago I had a discussion with Phil Harvey on that topic, because ExifTool did not find SRFocalLength for my K-S1.
Phil told me that apparently no one has been specifically looking for SRFocalLength. And I have not found the time to look for it.
Therefore, any help is welcome.
PS: It seems that the bodies that have no known SRFocalLength are all the bodies with AA filter simulation.
---------- Post added 04-29-16 at 07:55 PM ----------
Originally posted by stevebrot Pentax:LensData:LensFocalLength is 8-bit integer.
Yes, and with a very tricky encoding. 6 bits are used to encode an integer value, and the two other bits are used to encode an exponent.
The complete formula is '10*($val>>2) * 4**(($val&0x03)-2)' which apparenly was reverse engineered by an ExifTool contributor named Jens Duttke.
By studying various lenses, you may also notice that every zoom takes exactly 16 different values of LensFocalLength.
Last edited by Ptitboul; 04-29-2016 at 11:04 AM.