Review 1 of 26
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$0.00 Summary: This is one nice lens for the price. I recently sold the 70-200 F4L to purchase the 100-400 IS L. Well in the mean time I borrowed a 100-300 USM to hold me over. I finally got the 100-400 L and did a comparison with them side by side on a Gitzo 1227 Reporter CF tripod. I set them both @ 300mm 5.6 aperture, turned the IS off on the 100-400 IS so I would get no weird feedback, and started shooting my test shots. I must say that the 100-300 actually beat the 100-400, side by side they looked the same, the 100-400 had a little better color and contrast, but the sharpness was actually a little behind the 100-300 if you blew it up to 100%. If you fix up the color and contrast in the 100-300 then it gave a better picture then the 100-400 L IS, Hands down. Now I dont know if I got a really good copy of the 100-300 or a really bad copy of the 100-400 IS, or both, but I'm just letting it be known that this was my experience and that I would save a great deal of money over the 100-400 and pick the 100-300 USM and a 400 5.6 prime for the same price. I'm going to order another copy of the 100-400 L lens to make sure that this test will hold true. Strengths: Light, sharper than the 100-400 L lens I used wide open and stopped down. Its actually black, not an attention getter.
The autofocus is just as fast as the 100-400. Weaknesses: Build quality isn't as good as the 100-400, but it is reasonably good but what do you expect for $250.00 Similar Products Used: 70-200 F4L, best lens I ever used
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