Reviews and Problems with Canon EF-S 18-200mm f/3.5-5.6 IS
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Value for money 4
Overall quality 3
Build quality 4
Canon EF-S 18-200mm f/3.5-5.6 IS - Review / Test Report
31 October 2008
Conclusion: Canon had a somewhat weird timing regarding the release of their EF-S 18-200mm f/3.5-5.6 IS. It is extremely difficult to design such a lens to start with and more so under low-cost requirements. Combine these side conditions with the rather extreme quality requirements of a high resolution APS-C DSLR a la EOS 50D (@ 15mp) and this sounds like trouble. The Canon lens has a couple of weak spots.