I always have these 2 lenses when I am out shooting with the S5Pro. And I think there are also Canon equivalents to it. Nikkor 20mm f2.8 and the longest Voigtlander 40mm f2. That is if you are shooting street photography. I have never been a firm believer of zoom lenses (because it's never as good as primes, and also very expensive), I tend to walk nearer to my subjects instead, and not zooming in on them.