The high resolution of modern cameras doesn't just mean you can take great shots easily. It can also be useful if you're trying to find a small object you've dropped on the ground.
Reader Joe wrote in with this handy hint:
Recently I dropped a very small part into the gravel while working on my sailboat. Couldn't see the silver part in the grey gravel with the naked eye. Went indoors to get my camera and took a photo of the area where it fell. Then I was able to zoom in on the image and soon found the lost shackle pin.
It's a clever idea, and an easy one to implement given the ubiquity of camera-equipped smartphones. Thanks Joe!