I finally had a chance to take the 50-200SWD out with the E-M1 and the 1.4x TC to do some landscape shooting last weekend and I found the experience rather frustrating. Despite contrasty conditions, the lens often had difficulty locking, especially at the long-end. And when it did miss focus, it would invariably rack back and forth for some seconds and then give up. I need to try the lens a bit more without the teleconverter, but my initial impression was pretty poor. I was using the center AF point only (with small size), in order to improve precision. Would using a larger AF point (or more of them) improve the ability to lock on?