Broken Canon SD870is wouldn't focus to infinity, and even had a bit of front swing. It even got a hair or eyelash behind the lens. I pulled it apart and removed the hair. Using it as a macro camera got old, so I removed the IR blocker, hoping that would be enough added length to reach infinity, just for fun, and replaced the IR blocker with a piece of unexposed and processed Velvia. Seems to be working well enough for checking out IR.
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