i was looking to replace my 55-200mm lens i got with my first dslr camera. i don't have a huge budget, so was looking at the 18-140mm, 18-200mm, or 18-300mm. i have 2 prime lenses: 50mm and 85mm. i also have a tamron 17-50mm f2.8. i know people say you should stay away from getting lenses that overlap a lot in their focal lengths. my question is, since i have that tamron lens, is it worth replacing my 55-200 lens with any of the 3 i mentioned? they are all rated slightly higher than the 55-200 on dxomark.com, but isn't by much. wondering if anyone has any of these lenses, and if they can tell me if they offer anything of value to be worth me purchasing.
thanks!
thanks!