Easy Steps on How to Fix Macro or 0.5 Zoom Not Working on iPhone. Easily get the 0.5 lens on iPhone by following the steps on this video. Is your iPhone camera stuck on regular zoom and refusing to switch to macro (0.5x)? You're not alone! This quick fix guide by How to Crow will get your close-up game back on track in minutes. #iphone #macrolens #fix #tutorial #guide #howtocrow