Scott, Thanks for the suggestion. My Ronkinon is Manual Focus only, and I had it set at infinity. I see and agree there is a focus issue, but was thinking it may have been too long a shutter as I had it at 15 seconds. This was my first attempt not only of the milky way, but also using this lens. I was using Live View to keep the mirror up and a remote shutter release, so I am pretty sure it is not a camera shake either. I will take my lens out and shoot single stars with it and learn how to better focus. Also, not sure it has anything to do with anything, but I was also using "Noise Reduction on Long Shutter Release."