Quote:
Originally Posted by KANdaddy
I notice a lot of people saying the would have a 70-200 and a 24-70. Why wouldn't you kill two birds with one stone and get a 18-200? When I had my 18-55 and 55-200 I found it so annoying to have to change lens all the time because found I often wanted to shoot the same subject with the range of both lenses.
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Because the 18-200 is SLOOOOOOW. f5.6 at 200mm vs. f2.8 at 200mm. That means you can't control the DOF as well, and the lens will focus significantly slower (due to less light reaching the AF sensors.) Try shooting sports at 200mm with the 18-200 and see how many shots you get in focus vs. using a faster lens.
Also, the quality of the glass in the 24-70 and 70-200 is much better than the 18-200.
The 18-200 is a good lens (I used to own one), but I felt constrained by the variable aperture. Also, the 18-200 is a DX-only lens so if you move up to FF at some point, it has to go.
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