It seems I’ve run into a problem with the 100–400mm lens that I purchased this past June. The image in the viewfinder began jumping around when I pressed the shutter button half-way—often this would continue even after shutter release. I contacted Canon’s customer service. Based on my description of the problem they suspected the image stabilization had failed. I sent the lens to their service center and they accepted the lens under warranty. I hope to have it back in about another week. I’ll let you know how the process went, as well as how the lens works when I get it back into the field.
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Author: Stephen Fielding Images
I'm a retired medical sociologist from the University of Rochester. Climate change is one of the two great challenges facing humanity (the other is nuclear weapons). In writing about the impact of climate change I read reputable books and articles on the topic. So when I make statements about climate change you will see a link taking you to the scientific source(s) of the information I provide.
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Best wishes,
-Steve
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Stephen Fielding Images 