This week it may have been a bit more difficult shooting with just one app, contrast by hornbeck. Sometimes when we're not familiar with a particular app, we give up and move on to the next one. Hopefully you enjoyed exploring the possibilities of shooting with this very unique black and white app. Below are just a sampling of the photos submitted for the challenge. Below each image is the artist's Instagram username. Please visit the aom_contrastbyhornbeck hashtag to view them all.