I am new to photography, so I dont exactly know my niche. But I do know I enjoy taking: birding/wildlife photos, nature photos, and just other random pictures during vacations and such of buildings, scenery etc. I do not plan on taking any/many portraits etc I am looking to buy three lenses.. A carry around lens..A mid range zoom, and a telephoto. I would like quality lenses, but I am not a millionaire and dont want to spend 3k each. What is the difference between the Tamron AF 28-75mm f/2.8 XR Di LD Aspherical (IF) Tamron 17-50mm f/2.8 XR Di-II LD Aspherical [IF] Would they both be good, high quality, carry around lenses? Would I be able to do panoramic photos with them? And with these, is there any need for the Nifty Fifty? Also, how practical would a Canon EF 70-200mm f/4L USM Lens be for mid range shots? For the long distance, I was planning on going with the EF 100-400mm f/4.5-5.6L IS.