This is a quick and easy technique for Sony Alpha users to find the optimum Hyperfocal Distance when shooting landscape images. This technique will ensure maximum depth of field for sharp focus from the foreground to infinity. This technique will work for DSLR owners as well if they go into live view and then hold the depth of field preview button down. For Mirrorless users it is very much a case of WYSIWYG or what you see is what you get so there there no depth of field button required. The added advantage of Mirrorless users is that they can also preview the optimum focus distance through the EVF (electronic viewfinder) as well as on the LCD screen.