diff --git a/rtengine/iptransform.cc b/rtengine/iptransform.cc
index 0c900c998..577f02970 100644
--- a/rtengine/iptransform.cc
+++ b/rtengine/iptransform.cc
@@ -467,9 +467,10 @@ bool ImProcFunctions::transCoord (int W, int H, const std::vector<Coord2D> &src,
     double hpteta  = fabs (hpalpha - rtengine::RT_PI / 2) < 3e-4 ? 0.0 : acos ((hpdeg > 0 ? 1.0 : -1.0) * sqrt ((-oH * oH * tan (hpalpha) * tan (hpalpha) + (hpdeg > 0 ? 1.0 : -1.0) * oH * tan (hpalpha) * sqrt (16 * maxRadius * maxRadius + oH * oH * tan (hpalpha) * tan (hpalpha))) / (maxRadius * maxRadius * 8)));
     double hpcospt = (hpdeg >= 0 ? 1.0 : -1.0) * cos (hpteta), hptanpt = tan (hpteta);
     // Camera-based.
-    const double f = params->perspective.camera_focal_length *
-        params->perspective.camera_crop_factor * (maxRadius / sqrt(18.0*18.0 +
-                    12.0*12.0));
+    const double f =
+            ((params->perspective.camera_focal_length > 0) ? params->perspective.camera_focal_length : 24.0)
+            * ((params->perspective.camera_crop_factor > 0) ? params->perspective.camera_crop_factor : 1.0)
+            * (maxRadius / sqrt(18.0*18.0 + 12.0*12.0));
     const double p_camera_yaw = params->perspective.camera_yaw / 180.0 * rtengine::RT_PI;
     const double p_camera_pitch = params->perspective.camera_pitch / 180.0 * rtengine::RT_PI;
     const double p_camera_roll = params->perspective.camera_roll * rtengine::RT_PI_180;
@@ -1165,9 +1166,10 @@ void ImProcFunctions::transformGeneral(bool highQuality, Imagefloat *original, I
     const double hpcospt = (hpdeg >= 0 ? 1.0 : -1.0) * cos(hpteta);
     const double hptanpt = tan(hpteta);
     // Camera-based.
-    const double f = params->perspective.camera_focal_length *
-        params->perspective.camera_crop_factor * (maxRadius / sqrt(18.0*18.0 +
-                    12.0*12.0));
+    const double f =
+            ((params->perspective.camera_focal_length > 0) ? params->perspective.camera_focal_length : 24.0)
+            * ((params->perspective.camera_crop_factor > 0) ? params->perspective.camera_crop_factor : 1.0)
+            * (maxRadius / sqrt(18.0*18.0 + 12.0*12.0));
     const double p_camera_yaw = params->perspective.camera_yaw / 180.0 * rtengine::RT_PI;
     const double p_camera_pitch = params->perspective.camera_pitch / 180.0 * rtengine::RT_PI;
     const double p_camera_roll = params->perspective.camera_roll * rtengine::RT_PI_180;
diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index 686577d98..0f39a9a16 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -1854,8 +1854,8 @@ PerspectiveParams::PerspectiveParams() :
     method("simple"),
     horizontal(0.0),
     vertical(0.0),
-    camera_crop_factor(1.0),
-    camera_focal_length(24.0),
+    camera_crop_factor(0.0),
+    camera_focal_length(0.0),
     camera_pitch(0.0),
     camera_roll(0.0),
     camera_shift_horiz(0.0),
diff --git a/rtgui/perspective.cc b/rtgui/perspective.cc
index f3b6eea2c..7736f72ec 100644
--- a/rtgui/perspective.cc
+++ b/rtgui/perspective.cc
@@ -213,8 +213,7 @@ void PerspCorrection::read (const ProcParams* pp, const ParamsEdited* pedited)
 
     horiz->setValue (pp->perspective.horizontal);
     vert->setValue (pp->perspective.vertical);
-    camera_crop_factor->setValue (pp->perspective.camera_crop_factor);
-    camera_focal_length->setValue (pp->perspective.camera_focal_length);
+    setFocalLengthValue (pp, metadata);
     camera_pitch->setValue (pp->perspective.camera_pitch);
     camera_roll->setValue (pp->perspective.camera_roll);
     camera_shift_horiz->setValue (pp->perspective.camera_shift_horiz);
@@ -461,6 +460,11 @@ void PerspCorrection::setAdjusterBehavior (bool badd, bool camera_focal_length_a
     projection_yaw->setAddMode(projection_angle_add);
 }
 
+void PerspCorrection::setMetadata (const rtengine::FramesMetaData* metadata)
+{
+    this->metadata = metadata;
+}
+
 void PerspCorrection::trimValues (rtengine::procparams::ProcParams* pp)
 {
 
@@ -507,3 +511,49 @@ void PerspCorrection::setBatchMode (bool batchMode)
 
     method->append (M("GENERAL_UNCHANGED"));
 }
+
+void PerspCorrection::setFocalLengthValue (const ProcParams* pparams, const FramesMetaData* metadata)
+{
+    const double pp_crop_factor = pparams->perspective.camera_crop_factor;
+    const double pp_focal_length = pparams->perspective.camera_focal_length;
+    double default_crop_factor = 1.0;
+    double default_focal_length = 24.0;
+
+    // Defaults from metadata.
+    if (metadata && (pp_crop_factor <= 0 || pp_focal_length <= 0)) {
+        const double fl = metadata->getFocalLen();
+        const double fl35 = metadata->getFocalLen35mm();
+
+        if (fl <= 0) {
+            if (fl35 <= 0) {
+                // No focal length data.
+            } else {
+                // 35mm focal length available.
+                default_focal_length = fl35;
+            }
+        } else {
+            if (fl35 <= 0) {
+                // Focal length available.
+                default_focal_length = fl;
+            } else {
+                // Focal length and 35mm equivalent available.
+                default_focal_length = fl;
+                default_crop_factor = fl35 / fl;
+            }
+        }
+    }
+
+    // Change value if those from the ProcParams are invalid.
+    if (pp_crop_factor > 0) {
+        camera_crop_factor->setValue(pparams->perspective.camera_crop_factor);
+    } else {
+        camera_crop_factor->setDefault(default_crop_factor);
+        camera_crop_factor->setValue(default_crop_factor);
+    }
+    if (pp_focal_length > 0) {
+        camera_focal_length->setValue(pparams->perspective.camera_focal_length);
+    } else {
+        camera_focal_length->setDefault(default_focal_length);
+        camera_focal_length->setValue(default_focal_length);
+    }
+}
diff --git a/rtgui/perspective.h b/rtgui/perspective.h
index a7a2da7ed..c1dd20ee4 100644
--- a/rtgui/perspective.h
+++ b/rtgui/perspective.h
@@ -53,6 +53,9 @@ protected:
     Adjuster* projection_shift_vert;
     Adjuster* projection_yaw;
     LensGeomListener* lens_geom_listener;
+    const rtengine::FramesMetaData* metadata;
+
+    void setFocalLengthValue (const rtengine::procparams::ProcParams* pparams, const rtengine::FramesMetaData* metadata);
 
 public:
 
@@ -71,5 +74,6 @@ public:
     {
         lens_geom_listener = listener;
     }
+    void setMetadata (const rtengine::FramesMetaData* metadata);
     void trimValues          (rtengine::procparams::ProcParams* pp) override;
 };
diff --git a/rtgui/toolpanelcoord.cc b/rtgui/toolpanelcoord.cc
index a62bc5610..77cb5643b 100644
--- a/rtgui/toolpanelcoord.cc
+++ b/rtgui/toolpanelcoord.cc
@@ -615,6 +615,7 @@ void ToolPanelCoordinator::initImage (rtengine::StagedImageProcessor* ipc_, bool
 
         icm->setRawMeta (raw, (const rtengine::FramesData*)pMetaData);
         lensProf->setRawMeta (raw, pMetaData);
+        perspective->setMetadata (pMetaData);
     }