I’m amazed at how good digital imaging technology has gotten — it’s not quite as neat as x-ray vision, but cool anyway. Consumer grade digital cameras and video cameras take higher resolution pictures than most of us will ever need; we can look at good images from space for free on the internet; and prices are dropping on super spy cameras like this one. You can get the Li-Ion version for about $240.
Now you can check out the insides of gas tanks, garbage disposals, and even walls if you’re willing to patch a 3/4″ hole. This could prove very helpful even to those of us who aren’t professional inspectors. Your local equipment dealer may even rent you one if you just want something interesting to play with.