I got my first L- lens ~3 months after I bought my first DSLR (Canon 20D). As many others I am sure, I bought my first DSLR with a cheapo stock lens. After playing with it for a while, I was so disappointed with the results, I went out and bought 17-...
24-105mm f/4 L IS USM paired with my 5D MK2. Awesome walkaround lens, very sharp edge-to-edge. I have many other Canon lenses that I rarely used since I bought 24-105!
