The main attraction for the curve at Berwyn was SEPTA’s AEM7 powered evening suburban trains. While these run every weekday, summer evenings are the best times to catch them in good light on the Main Line, as most sets only work one turn daily, and tend to lay idle during off peak. In the winter, they largely operate in darkness. Having refined my location based on passage of the earlier Silverliner IV, I was prepared for the arrival of the AEM7 and able to make a more pleasing image. High clouds slightly softened the sun so I adjusted my exposure accordingly; ISO200, f6.3 1/640.