BigBigLens.com - How to get users to register and share photos?

<p>I recently started a new website http://www.BigBigLens.com.<br>

I want it to be an open platform for users to register to post and share the photos. I categorise the photos by the lens used to take them.<br>

Up to now, I only have a couple of good friends putting their photos there. <br>

How can I get more users to register and share?<br>

I have already made it easier to register - direct login via facebook.<br>

Your advice is important to me.<br>

Thank you.</p><div>[ATTACH=full]841213[/ATTACH]</div>