It never ceases to amaze me the difference a good lens can make to your image quality. I know this sounds like an obvious thing, but until you've used some high end glass, you don't really know just how much of a difference it can make. There's a lot of misinformation out there on the internet (shocker) when it comes to what makes a good lens, or even the importance of good quality optics to begin with. One well known and somewhat infamous blogger, has even stated that the lens actually makes no difference in terms of image quality. Nothing could be further from the truth.