diff --git a/src/pentaxmn.cpp b/src/pentaxmn.cpp
index eba7e843..4f265eca 100644
--- a/src/pentaxmn.cpp
+++ b/src/pentaxmn.cpp
@@ -1175,15 +1175,11 @@ namespace Exiv2 {
             unsigned long lensID    = 0x32c;
             unsigned long index     = 0;
 
-            std::string model       = getKeyString("Exif.Image.Model"      ,metadata);
             long        focalLength = getKeyLong  ("Exif.Photo.FocalLength",metadata);
             bool        bFL10_20    = 10 <= focalLength && focalLength <= 20;
-            bool        bK10D_K3    = model.find("PENTAX K10D") != std::string::npos
-                                   || model.find("PENTAX K-3")  != std::string::npos
-                                    ;
 
             // std::cout << "model,focalLength = " << model << "," << focalLength << std::endl;
-            if ( bFL10_20 && bK10D_K3 ) index = 1;
+            if ( bFL10_20 ) index = 1;
 
             if ( index > 0 )  {
                 const TagDetails* td = find(pentaxLensType, lensID);
@@ -1223,9 +1219,11 @@ namespace Exiv2 {
                 unsigned int  autoAperture     = lensInfo->toLong(base+1) & 0x01 ;
                 unsigned int  minAperture      = lensInfo->toLong(base+2) & 0x06 ;
                 unsigned int  minFocusDistance = lensInfo->toLong(base+3) & 0xf8 ;
-                unsigned int  dontKnow         = lensInfo->toLong(base+4);
 
-                if ( autoAperture == 0x0 && minAperture == 0x0 && minFocusDistance == 0x28 && dontKnow == 148) index = 8;
+                if ( autoAperture == 0x0 && minAperture == 0x0 && minFocusDistance == 0x28 && lensInfo->toLong(base+4) == 148) index = 8;
+                if ( autoAperture == 0x0 && minAperture == 0x0 && minFocusDistance == 0x28 && lensInfo->toLong(base+5) == 110) index = 7;
+                if ( autoAperture == 0x0 && minAperture == 0x0 && minFocusDistance == 0x28 && lensInfo->toLong(base+4) == 110) index = 7;
+
             } else if ( value.count() == 3 ) {
                 // http://dev.exiv2.org/attachments/download/858/_IGP9032.DNG
                 // $ exiv2 -pv --grep Lens ~/Downloads/_IGP9032.DNG
@@ -1294,7 +1292,15 @@ namespace Exiv2 {
                                                     ;
         	if ( value.count() == 4 ) {
             	std::string model       = getKeyString("Exif.Image.Model"      ,metadata);
-                if ( model.find("PENTAX K-3")==0 && lensInfo->count() == 128 && lensInfo->toLong(1) == 131 && lensInfo->toLong(2) == 128 ) index = 6;
+                if ( model.find("PENTAX K-3")==0 && lensInfo->count() == 128 && lensInfo->toLong(1) == 131 && lensInfo->toLong(2) == 128 )
+                    index = 6;
+            }
+        	if ( value.count() == 2 ) {
+            	std::string model       = getKeyString("Exif.Image.Model"      ,metadata);
+                if ( model.find("PENTAX K100D")==0 && lensInfo->count() == 44 )
+                    index = 6;
+                if ( model.find("PENTAX *ist DL")==0 && lensInfo->count() == 36 )
+                    index = 6;
             }
 
             if ( index > 0 )  {
diff --git a/test/bugfixes-test.sh b/test/bugfixes-test.sh
index a14e1d51..954e6d5e 100755
--- a/test/bugfixes-test.sh
+++ b/test/bugfixes-test.sh
@@ -469,8 +469,8 @@ source ./functions.source
 	for i in a b c d e f g; do
 	  filename=exiv2-bug$num$i.exv
 	  echo '------>' Bug $num$i '<-------' >&2
-	  copyTestFile                        $filename
-	  runTest exiv2 -pa -g Lens           $filename
+	  copyTestFile                      $filename
+	  runTest exiv2 -pa -g Lens         $filename
 	done
 
 	num=1145
@@ -478,8 +478,8 @@ source ./functions.source
 	for i in a b c d e; do
 	  filename=exiv2-bug$num$i.exv
 	  echo '------>' Bug $num$i '<-------' >&2
-	  copyTestFile                        $filename
-	  runTest exiv2 -pa -g Lens           $filename
+	  copyTestFile                      $filename
+	  runTest exiv2 -pa -g Lens         $filename
 	done
 
 	num=1153
@@ -487,17 +487,17 @@ source ./functions.source
 	for E in A J; do for i in a b c d e f g h i j k; do
 	  filename=exiv2-bug$num${E}${i}.exv
 	  echo '------>' Bug $num${E}${i} '<-------' >&2
-	  copyTestFile                        $filename
-	  runTest exiv2 -pa -g Lens           $filename
+	  copyTestFile                      $filename
+	  runTest exiv2 -pa -g Lens         $filename
 	done;done
 
 	num=1155
 	printf "$num " >&3
-	for i in a b c; do
+	for i in a b c d e f g h i; do
 	  filename=exiv2-bug$num${i}.exv
 	  echo '------>' Bug $num${i} '<-------' >&2
-	  copyTestFile                        $filename
-	  runTest exiv2 -pa -g Lens           $filename
+	  copyTestFile                      $filename
+	  runTest exiv2 -pa -g Lens         $filename
 	done
 
 ) 3>&1 > $results 2>&1
diff --git a/test/data/bugfixes-test.out b/test/data/bugfixes-test.out
index 16221152..9233ed22 100644
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diff --git a/test/data/exiv2-bug1155d.exv b/test/data/exiv2-bug1155d.exv
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index 00000000..3c8f95c8
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diff --git a/test/data/exiv2-bug1155e.exv b/test/data/exiv2-bug1155e.exv
new file mode 100644
index 00000000..c62e4bd0
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new file mode 100644
index 00000000..bae1e13c
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diff --git a/test/data/exiv2-bug1155g.exv b/test/data/exiv2-bug1155g.exv
new file mode 100644
index 00000000..1f753acb
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diff --git a/test/data/exiv2-bug1155h.exv b/test/data/exiv2-bug1155h.exv
new file mode 100644
index 00000000..911aaeca
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index 00000000..ef8a0529
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