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kyle wrote:
Rather than get this lens why not go for the 70-200 2.8 'L' with a 1.4TC. The Lens is MUCH better than the 100-400 even with the TC on it. A cheaper 70-200 F4 version is also possible and will deliver very high quality.
A big problem with the 100-400 type of zoom is that it is a push pull type --i.e you don't rotate the lens for focal length you push it in and out like using a telescope.
The push pull can also get loose so it's difficult to maintain the focal length stably.
Cheers
-K
Kyle,
I have both the 70-200 IS and the 100-400. I'll agree that the 70-200 does subtly better than the 100-400 below 200, but the 70-200 with a 1.4x is marginally worse than the 100-400, and the 70-200 with a 2x is significantly worse than the 100-400. Also, the 70-200 is about 1/2 pound heavier, even without a TC and slightly longer than the 100-400 (contracted). Also, the push-pull on the 100-400 does have a locking ring, and, whether or not you
like the design, it does a good job of maintaining focal length stability.
The bottom line is that, if I could only have 1 of these 2 lenses, if I were doing most of my shooting below 200mm and never needed anything at 400, I would definitely get the 70-200. However, if the much of my shooting was going to be beyond 200 or if any of it needed to be at 400, my choice would be the 100-400.
Les
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