The Canon 55-250 EF-S lens
has a minimum focusing distance of 3.6 feet ... and at
full telephoto (400mm in 35mm format due to 1.6x focal length multiplier), that's some good magnification.
With help from my Son Kyle, lets see how close that is!
More Canon Camera stuff
25% crop of complete image from Canon 40D - hand-held 1/250s, F/5.6, ISO1600
100% pixels from the center - depth of field is about 0.1" - note flash reflection
More Canon Camera stuff