And on that subject, when you're winging it in-cam like I do, there are 2 tricky things to nail down: 1. Focus. You can't just bang the rokinon 12 out to the stop and go. It will focus slightly past infinity. So use that Focus Assist button, and I also try to shoot one quick one first, then pixel peep it in review for sharpness. 2. White Balance. If you've still got the camera around 5900 from your daytime shots, your whole sky will be sodium vapor street light orange. I go way south for the deep blues, 3900 or so?