This contest is divided into 6 categories: Natural World, Travel, People, The American Experience, Altered Images, Mobile. Grand Prize: $2,500
The contest is divided into eight monthly rounds, each one focusing on a specific theme. The winner of each round will receive prizes from Sigma.
The world's premier competition for garden, plant, flower and botanical photography. Prizes: Best Single Image: £7,500 Best Portfolio: £2,000