Solved! Go to Solution.
var imageServiceLayer = new esri.layers.ArcGISImageServiceLayer("http://<my server name>/arcgis/rest/services/RCS/ImageServer/" + imageObjectID + "/image?bbox=-117.86107846499999,33.215995932000055,-117.35430291299997,33.62007476500003", { "opacity": .50 }); map.addLayer(imageServiceLayer);
var imageServiceLayer = new esri.layers.ArcGISImageServiceLayer("http://<my server name>/arcgis/rest/services/RCS/ImageServer/" + imageObjectID + "/image?bbox=-117.86107846499999,33.215995932000055,-117.35430291299997,33.62007476500003", { "opacity": .50 }); map.addLayer(imageServiceLayer);