Our Columnist Michael Baranovic, along with Oliver Lang have partnered with Head On Photo Festival and are inviting photographers from all around the world to submit mobile phone photographs on the theme of Backyard.  The deadline for submissions is 12 Midnight Sunday 28 April 2013. They will select 30 winning photographs that will then go on to be exhibited in the historic Superintendent’s Residence in Sydney’s public Centennial Park.  The exhibition will run from May 17 to June 24. Submissions can only be made through the official Backyard page: www.mobilephotonetwork.com/backyard A one off entry fee of $10 allows photographers to submit up to five mobile photos for consideration. The judges will be…