Yes, I'm also just using the free version so far. I currently use the a7r and that might have been the 24mm Canon L adapted with the Metabones (I've sold my canon L glass and metabones). Zeiss 21mm Loxia is compact and well... bad ass. Before the Zeiss I used a cheap 21mm Olympus 3.5 as the Zeiss wasn't yet available where I was. That Olympus is really a contender if $$ are a factor.