A fisheye lens can be great fun to use, but its not meant for every photo you take. It is great for those ultra wide angle shots that need the extra touch of drama and artistic effect. There are a few sacrifices for the extra wide bundle of fun. Fisheye lenses are prone to chromatic abbression and vignetting. But, these issues can be cleaned up in post processing. If you're watching your budget, then consider on of the many great quality manual focus lens options. If you want to add something exciting to your photography, consider all the fun you can have with a fisheye lens.