Hi there I am looking for a new telephoto lens for my Canon EOS 1100D camera.I do aviation,sports and nature photography and already have the Canon EF 75-300 F4-5.6 III USM although I am looking for something that is built better with no nonsense image quality and would be willing to spend up to about 350.I am considering the Canon EF 70-300 F4-5.6 IS USM and the Tamron 70-300 F4-5.6 VC DI USD although ideally I would go for the Canon EF 70-200 F4L USM lens.