Over at Instructables, user Banjomaster shows how to make a fisheye lens for his Nikon D90 for just $16, with the help of one of those wide-angle doorway peephole lenses.
It looks like a pretty simple mod, both in materials required and construction method:
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If this load of recently filed Apple patents become a reality, your iPhone may become a perfect tool for spies soon, with real world object identification, faces recognition, voice alteration, and text filtering, among other things:
• Real world object identification: This function will let you...
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