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Loswr
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akiskev said:Why, in your opinion, the 100-400 lacks this seal?neuroanatomist said:Note that the 100-400mm lacks the seal at the mount gasket that would otherwise make it a 'weather-sealed' lens like the 28-300mm.
Timing. Canon started releasing 'weather- and dust-sealed' lenses in 1999, and the 100-400mm is from 1998 (whereas the 28-300mm is from 2004).
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