There's no other brighter 35mm lens. Justification of using this lens is the uniqueness. Just like the pupils of a cat's eye open as the sun sets, the time when you can open the diaphragm approaches. You can shoot with the available light, so you can realize the atmosphere naturally. It's the night when you can make the most of this lens. It's sharp wide open and of course an excellent performer during the daytime. Some people say "once you stop down, it's no different from a marble," but that's not true. When using a hefty lens becomes meaningful, you can always stop down. With the unique transparency and delicate drawing, this lens has its own worldview.