I have a new routine, designed to improve my understanding of perspective. I choose a prime each day, and leave my other lenses at home. Today's prime was the 7.5/3.5 Rokinon. I used it for some interiors at Lowe's. My wife waiting for the rep... a very helpful guy named Gene. Then I slipped. I liked Gene's environmental portrait, but to do a proper portrait, I needed the 45/1.8, which I had accidentally left in the camera bag.