diff --git a/Manager.php b/Manager.php
index 544641c..5436280 100644
--- a/Manager.php
+++ b/Manager.php
@@ -274,8 +274,14 @@ private function convertFormat($format)
      */
     private function checkImage($path)
     {
+        // remove explicit format if present
+        if(preg_match("/:(?!\/\/)/", $path) === 1) {
+            $path = preg_split("/:(?!\/\/)/", $path);
+            $path = $path[1];
+        }
+
         if (!file_exists($this->getWebDirectory() . '/' . $path) && !file_exists($path)) {
-            throw new NotFoundException(sprintf("Unable to find the image \"%s\" to cache", $path));
+            throw new NotFoundException(sprintf("Unable to find image \"%s\"", $path));
         }
 
         if (!is_file($this->getWebDirectory() . '/' . $path) && !is_file($path)) {