diff --git a/rtengine/imagedata.cc b/rtengine/imagedata.cc
index 2a8419494..8250eab60 100644
--- a/rtengine/imagedata.cc
+++ b/rtengine/imagedata.cc
@@ -262,7 +262,7 @@ void ImageData::extractInfo () {
                     lens = "Canon " + ldata;
                 }
             }
-            if( !found ){
+            if( !found || lens.substr(lens.find(' ')).length() < 7 ){
             	lt = mnote->findTag("LensID");
                 if ( lt ) {
                     std::string ldata = lt->valueToString ();
@@ -289,7 +289,7 @@ void ImageData::extractInfo () {
         }
     } else if (exif->getTag ("DNGLensInfo")) {
 		lens = exif->getTag ("DNGLensInfo")->valueToString ();
-    } if (exif->getTag ("LensModel")) {
+    } else if (exif->getTag ("LensModel")) {
 		lens = exif->getTag ("LensModel")->valueToString ();
 	} else if (exif->getTag ("LensInfo")) {
 		lens = exif->getTag ("LensInfo")->valueToString ();
diff --git a/rtexif/canonattribs.cc b/rtexif/canonattribs.cc
index faf0bcd5a..3115887c8 100644
--- a/rtexif/canonattribs.cc
+++ b/rtexif/canonattribs.cc
@@ -556,6 +556,7 @@ class CALensInterpreter : public IntLensInterpreter< int > {
             choices.insert(p_t(169, "Sigma 18-200mm f/3.5-6.3 DC OS"));
             choices.insert(p_t(169, "Sigma 15-30mm f/3.5-4.5 EX DG Aspherical"));
             choices.insert(p_t(169, "Sigma 18-50mm f/2.8 Macro"));
+            choices.insert(p_t(169, "Sigma 30mm f/1.4 EX DC HSM"));
             choices.insert(p_t(169, "Sigma 50mm f/1.4 EX DG HSM"));
             choices.insert(p_t(169, "Sigma 85mm f/1.4 EX DG HSM"));
             choices.insert(p_t(170, "Canon EF 200mm f/2.8L II"));
diff --git a/rtexif/rtexif.cc b/rtexif/rtexif.cc
index 9bab4de2b..695f935f1 100644
--- a/rtexif/rtexif.cc
+++ b/rtexif/rtexif.cc
@@ -1926,6 +1926,9 @@ bool extractLensInfo(std::string &fullname,double &minFocal, double &maxFocal, d
 		    char *sp=pMM;
 		    while( *sp != ' ' && sp > buffer )sp--;
 		    sscanf(sp+1,"%lf-%lf",&minFocal,&maxFocal);
+		    if(maxFocal==0.) {
+		    	maxFocal = minFocal;
+		    }
 		    return true;
 		 }
 	 }