{% load thumbnail %}
{% for image in album.images.all %}
    {% thumbnail image.image "120x120" crop="center" as im %}
        {% thumbnail image.image "600x600" as full %}
            <a rel='gallery[pp_gal]' href="{{ full.url }}">
                    <img class="preview" {% if image.title %} alt="{{ image.title }}" {% endif %} src="{{ im.url }}">
            </a>
        {% endthumbnail %}
    {% endthumbnail %}
{% endfor %}