First off, I am a hobbist. Have been for 30+ years. Years ago I worked for a fashion photographer and enjoyed it, however It did not appeal as a job I wanted to do. I have a totally different profession I love. I shoot alot of sports for the local collage with my, Canon 30D's, Canon 70-200, 1.4 telecoerter. I also shoot wildlife, such that I can with the lenses I have. So here is my question. I never plan on trying to go pro, this is just a hobby I love. I currently have about $4700 saved up for the Canon 400mm f2.8. ($6555.00 from B&H) So how crazy is it for a hobbist to spend that much money on a single lens. I have no plans on leaving Canon, and I know I will be upgrading bodies over time. I was a Nikon film shooter since 1972 with F2's and a bunch of great glass collected over the years. It was the F2's I replace when I went digital with the 30D. I have kept my eye on the prize in saving money, but sometimes when friends question spending that much on a lens It makes me have a bit of doubts.