diff --git a/spec/Layers/DynamicMapLayerSpec.js b/spec/Layers/DynamicMapLayerSpec.js
index 53f6d6d08..bc4570d32 100644
--- a/spec/Layers/DynamicMapLayerSpec.js
+++ b/spec/Layers/DynamicMapLayerSpec.js
@@ -56,7 +56,7 @@ describe('L.esri.DynamicMapLayer', function () {
 
   beforeEach(function () {
     clock = sinon.useFakeTimers();
-    server = sinon.fakeServer.create();
+    server = sinon.fakeServer.create(); // { logger: console.log }
     server.respondWith('GET', new RegExp(/http:\/\/services.arcgis.com\/mock\/arcgis\/rest\/services\/MockMapService\/MapServer\/export\?bbox=-?\d+\.\d+%2C-?\d+\.\d+%2C-?\d+\.\d+%2C-?\d+\.\d+&size=500%2C500&dpi=96&format=png32&transparent=true&bboxSR=3857&imageSR=3857&f=json/), JSON.stringify({
       href: Image1
     }));
@@ -410,6 +410,21 @@ describe('L.esri.DynamicMapLayer', function () {
     expect(spy.getCall(0).args[0]).to.equal('./proxy.ashx?' + imageUrl);
   });
 
+  it('should be able to request image using a proxy', function () {
+    server.respondWith('GET', new RegExp(/\.\/proxy.ashx\?http:\/\/services.arcgis.com\/mock\/arcgis\/rest\/services\/MockMapService\/MapServer\/export\?bbox=-?\d+\.\d+%2C-?\d+\.\d+%2C-?\d+\.\d+%2C-?\d+\.\d+&size=500%2C500&dpi=96&format=png32&transparent=true&bboxSR=3857&imageSR=3857&f=json/), JSON.stringify({
+      imageData: base64Image,
+      contentType: 'image/png'
+    }));
+    layer = L.esri.dynamicMapLayer({
+      url: url,
+      f: 'image',
+      proxy: './proxy.ashx'
+    });
+    var spy = sinon.spy(layer, '_renderImage');
+    layer.addTo(map);
+    expect(spy.getCall(0).args[0]).to.match(new RegExp(/\.\/proxy.ashx\?http:\/\/services.arcgis.com\/mock\/arcgis\/rest\/services\/MockMapService\/MapServer\/export\?bbox=-?\d+\.\d+%2C-?\d+\.\d+%2C-?\d+\.\d+%2C-?\d+\.\d+&size=500%2C500&dpi=96&format=png32&transparent=true&bboxSR=3857&imageSR=3857&proxy=\.%2Fproxy.ashx&f=image/));
+  });
+
   it('should be able to parse real base64 images from the export service', function (done) {
     server.respondWith('GET', new RegExp(/http:\/\/services.arcgis.com\/mock\/arcgis\/rest\/services\/MockMapService\/MapServer\/export\?bbox=-?\d+\.\d+%2C-?\d+\.\d+%2C-?\d+\.\d+%2C-?\d+\.\d+&size=500%2C500&dpi=96&format=png32&transparent=true&bboxSR=3857&imageSR=3857&f=json/), JSON.stringify({
       imageData: base64Image,
diff --git a/src/Layers/DynamicMapLayer.js b/src/Layers/DynamicMapLayer.js
index 9ccb4f715..128af59c6 100644
--- a/src/Layers/DynamicMapLayer.js
+++ b/src/Layers/DynamicMapLayer.js
@@ -20,10 +20,6 @@ export var DynamicMapLayer = RasterLayer.extend({
     this.service = mapService(options);
     this.service.addEventParent(this);
 
-    if (options.proxy && options.f !== 'json') {
-      options.f = 'json';
-    }
-
     Util.setOptions(this, options);
   },
 
@@ -193,7 +189,11 @@ export var DynamicMapLayer = RasterLayer.extend({
       }, this);
     } else {
       params.f = 'image';
-      this._renderImage(this.options.url + 'export' + Util.getParamString(params), bounds);
+      var fullUrl = this.options.url + 'export' + Util.getParamString(params);
+      if (this.options.proxy) {
+        fullUrl = this.options.proxy + '?' + fullUrl;
+      }
+      this._renderImage(fullUrl, bounds);
     }
   }
 });