Went through the US Patent Office today and found some interesting stuff. Here is what they call a conversion lens, maybe a teleconverter but looks more like the 70 limited with the hood attached to me. Guess "conversion" means something other than 70mm limited lens?
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And this one is a Single lens Reflex camera, which strangely looks familiar. 645D anyone?
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Here is a lens design like the Canon 100-400mm lens with the push-pull Zoom feature.
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here
Such wonderful things that could be made into factual items.