diff --git a/changelog.txt b/changelog.txt
index d2429333..0ac9abfb 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -47,6 +47,7 @@ OPENSEADRAGON CHANGELOG
 * You can now rotate the navigator along with the main viewer (#455)
 * Viewport.setRotation now allows all rotation angles (#466)
 * Pinch rotate is now available (defaults to off) (#468)
+* Added option for home button to fill viewer (#474)
 
 1.1.1:
 
diff --git a/src/iiiftilesource.js b/src/iiiftilesource.js
index 8c1da291..c3c1fcd5 100644
--- a/src/iiiftilesource.js
+++ b/src/iiiftilesource.js
@@ -54,6 +54,7 @@ $.IIIFTileSource = function( options ){
 
     options.tileSizePerScaleFactor = {};
 
+    // N.B. 2.0 renamed scale_factors to scaleFactors
     if ( this.tile_width ) {
         options.tileSize = this.tile_width;
     } else if ( this.tile_height ) {
@@ -62,13 +63,13 @@ $.IIIFTileSource = function( options ){
         // Version 2.0 forwards
         if ( this.tiles.length == 1 ) {
             options.tileSize = this.tiles[0].width;
-            this.scale_factors = this.tiles[0].scale_factors;
+            this.scale_factors = this.tiles[0].scaleFactors;
         } else {
             // Multiple tile sizes at different levels
             this.scale_factors = [];
             for (var t = 0; t < this.tiles.length; t++ ) {
-                for (var sf = 0; sf < this.tiles[t].scale_factors.length; sf++) {
-                    var scaleFactor = this.tiles[t].scale_factors[sf];
+                for (var sf = 0; sf < this.tiles[t].scaleFactors.length; sf++) {
+                    var scaleFactor = this.tiles[t].scaleFactors[sf];
                     this.scale_factors.push(scaleFactor);
                     options.tileSizePerScaleFactor[scaleFactor] = this.tiles[t].width;
                 }
diff --git a/src/openseadragon.js b/src/openseadragon.js
index 010a348d..63f0a659 100644
--- a/src/openseadragon.js
+++ b/src/openseadragon.js
@@ -218,6 +218,10 @@
   *
   * @property {Number} [maxZoomLevel=null]
   *
+  * @property {Boolean} [homeFillsViewer=false]
+  *     Make the 'home' button fill the viewer and clip the image, instead
+  *     of fitting the image to the viewer and letterboxing.
+  *
   * @property {Boolean} [panHorizontal=true]
   *     Allow horizontal pan.
   *
@@ -909,6 +913,7 @@ window.OpenSeadragon = window.OpenSeadragon || function( options ){
             defaultZoomLevel:       0,
             minZoomLevel:           null,
             maxZoomLevel:           null,
+            homeFillsViewer:        false,
 
             //UI RESPONSIVENESS AND FEEL
             clickTimeThreshold:     300,
diff --git a/src/viewer.js b/src/viewer.js
index 4027c73e..388d6b1e 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -1849,7 +1849,8 @@ function openTileSource( viewer, source, options ) {
             degrees:                 _this.degrees //,
             //TODO: figure out how to support these in a way that makes sense
             //minZoomLevel:           this.minZoomLevel,
-            //maxZoomLevel:           this.maxZoomLevel
+            //maxZoomLevel:           this.maxZoomLevel,
+            //homeFillsViewer:        this.homeFillsViewer
         });
     } else {
         if( source ){
@@ -1869,7 +1870,8 @@ function openTileSource( viewer, source, options ) {
             maxZoomLevel:       _this.maxZoomLevel,
             viewer:             _this,
             degrees:            _this.degrees,
-            navigatorRotate:    _this.navigatorRotate
+            navigatorRotate:    _this.navigatorRotate,
+            homeFillsViewer:    _this.homeFillsViewer
         });
     }
 
diff --git a/src/viewport.js b/src/viewport.js
index c6c7b49a..0c3744b0 100644
--- a/src/viewport.js
+++ b/src/viewport.js
@@ -84,7 +84,8 @@ $.Viewport = function( options ) {
         defaultZoomLevel:   $.DEFAULT_SETTINGS.defaultZoomLevel,
         minZoomLevel:       $.DEFAULT_SETTINGS.minZoomLevel,
         maxZoomLevel:       $.DEFAULT_SETTINGS.maxZoomLevel,
-        degrees:            $.DEFAULT_SETTINGS.degrees
+        degrees:            $.DEFAULT_SETTINGS.degrees,
+        homeFillsViewer:    $.DEFAULT_SETTINGS.homeFillsViewer
 
     }, options );
 
@@ -186,15 +187,22 @@ $.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{
      * @function
      */
     getHomeZoom: function() {
-        var aspectFactor =
-            this.contentAspectX / this.getAspectRatio();
-
         if( this.defaultZoomLevel ){
             return this.defaultZoomLevel;
         } else {
-            var output = ( aspectFactor >= 1 ) ?
-                1 :
-                aspectFactor;
+            var aspectFactor =
+                this.contentAspectX / this.getAspectRatio();
+
+            var output;
+            if( this.homeFillsViewer ){ // fill the viewer and clip the image
+                output = ( aspectFactor >= 1) ?
+                    aspectFactor :
+                    1;
+            } else {
+                output = ( aspectFactor >= 1 ) ?
+                    1 :
+                    aspectFactor;
+            }
 
             return output / this.homeBounds.width;
         }
diff --git a/test/data/iiif_2_0_tiled/info.json b/test/data/iiif_2_0_tiled/info.json
index 4cb0c3ab..d9b56f62 100644
--- a/test/data/iiif_2_0_tiled/info.json
+++ b/test/data/iiif_2_0_tiled/info.json
@@ -4,7 +4,7 @@
   "protocol": "http://iiif.io/api/image",
   "height": 1024,
   "width": 775,
-  "tiles" : [{"width":256, "scale_factors":[1,2,4,8]}],
+  "tiles" : [{"width":256, "scaleFactors":[1,2,4,8]}],
 
   "profile": ["http://iiif.io/api/image/2/level1.json",
     {