Conservation photographer and Sony Artisan Of Imagery Cristina Mittermeier talks with AlphaUniverse.com editor Christopher Robinson about making a difference for the environment with photography. In Tech Talk, Sony's El-Deane Naude explains how white balance works in Sony cameras and best practices for setting your white balance. And Cristina Mittermeier offers up Do This Now tips on prime lenses and how to hone your visual story-telling skills.