diff --git a/src/web/templates/index.html b/src/web/templates/index.html
index 106dfe7..417a2f1 100644
--- a/src/web/templates/index.html
+++ b/src/web/templates/index.html
@@ -632,7 +632,7 @@ function addStereocameras(scene) {
     var baseX = 6.7, baseY = -1, baseZ = 1;
     var stereoGap = 0.06; // 6cm between cameras
     var camAngle = 15; // degrees each camera is rotated outward from straight +Y
-    var hfov = 160; // horizontal FOV degrees
+    var hfov = 128; // horizontal FOV degrees (IMX219 160° diagonal, 4:3 sensor)
 
     var cam0x = baseX - stereoGap / 2;
     var cam1x = baseX + stereoGap / 2;