David Nevala photographs children on an Amish farm in Wisconsin.

How does one photograph a group of people whose beliefs prohibit virtually all photography? David Nevala found out a few summers ago when he arrived in Hillsboro, Wis., on a daylong assignment to photograph an Amish farm for the farm cooperative Organic Valley. “It was like walking into another world. I was trying my hardest not to do anything wrong or make any mistakes or offend someone,” he said.