diff -up exiv2-0.26/src/pentaxmn.cpp.pentax exiv2-0.26/src/pentaxmn.cpp

--- exiv2-0.26/src/pentaxmn.cpp.pentax	2017-04-26 14:16:21.000000000 -0500

+++ exiv2-0.26/src/pentaxmn.cpp	2019-01-10 14:21:00.342499581 -0600

@@ -1254,6 +1254,7 @@ namespace Exiv2 {

             unsigned long lensID = 0x3ff;

             unsigned long index  = 0;

+            // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Pentax.html#LensData

             const ExifData::const_iterator lensInfo = metadata->findKey(ExifKey("Exif.PentaxDng.LensInfo")) != metadata->end()

                                                     ? metadata->findKey(ExifKey("Exif.PentaxDng.LensInfo"))

                                                     : metadata->findKey(ExifKey("Exif.Pentax.LensInfo"))

@@ -1268,8 +1269,6 @@ namespace Exiv2 {

                 // 0x0207 Pentax       LensInfo  Undefined  36 3 255 0 0 40 148 71 152 80 6 241 65 237 153 88 36 1 76 107 251 255 255 255 0 0 80 6 241 0 0 0 0 0 0 0 0

                 unsigned long base   = 1;

-                // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Pentax.html#LensData

-                const ExifData::const_iterator lensInfo = metadata->findKey(ExifKey("Exif.Pentax.LensInfo"));

                 unsigned int  autoAperture     = lensInfo->toLong(base+1) & 0x01 ;

                 unsigned int  minAperture      = lensInfo->toLong(base+2) & 0x06 ;

                 unsigned int  minFocusDistance = lensInfo->toLong(base+3) & 0xf8 ;