I recently purchased my first DSLR - a Canon Rebel EOS T6i. These are the lenses I have purchased. Canon: - EF-S 18-55mm f/3.5-5.6 IS II (Kit Lens) - EF 50mm f/1.8 STM Standard Lens - EF-S 10-18mm f/4.5-5.6 IS STM Ultra-Wide Zoom Lens Tamron : - 18-200mm f/3.5-6.3 Di II VC All-in-One Zoom Lens I would love to get into sport and wildlife photography, and am debating whether I should sell my Tamron for money towards a Canon EF 70-200mm f/4L USM Telephoto Zoom Lens. Only thing I am unsure about is that there is no Image Stabilization on this Canon Lens. I can't afford the $1100 version with IS at the moment. Would it make sense to sell my Tamron and use money towards the Canon EF 70-200mm f/4L, or sell my Kit Lense - EF-S 18-55mm f/3.5-5.6 IS II. What functions does my Tamron have that the Canon i wish to purchase has? I know the Tamron has IS which is a plus. I have yet to open my Tamron because Best Buy has a 25 percent stocking fee if product is opened. So i am waiting before I decide. Some suggestions and advice would be much appreciated. Or if there are any other lenses for budget price that will get the job done. As well, any other types of lens suggestions would be good. I love Macro shots of close up flowers and insects. Thanks you!!