Yandex MAP object from json

gistfile1.txt

ymaps.ready()
    .done(function (ym) {

        myMap = new ymaps.Map("map", {
            center: [59.704197, 30.023431],
            zoom: 13
        });

        jQuery.getJSON('home/cameras.json', function (json) {
            var geoObjects = ym.geoQuery(json)
                .addToMap(myMap);
                //.applyBoundsToMap(myMap, {
                //    checkZoomRange: true
                //});
        });

        var myBalloonLayout = ymaps.templateLayoutFactory.createClass(
            '<iframe width="320" height="240" src=$[properties.link] frameborder="0" allowfullscreen></iframe>'
        );

        ymaps.layout.storage.add('cam#layout', myBalloonLayout);

    });