Eye Spy

I have been renting a 100mm Macro Canon lens, and was trying to take close up of the kids eyes, at work. The detail is really awesome I think. Sometimes the top eye lashes were blurry, because the kids were blinking. The lens itself, really seemed to have to search to find the right focus, it would go all the way out and then all the way back in, even between shots. It was kinda weird. Don't know if that is common with this lens, or not, but we will find out.