Wear rain gear. "Be prepared to get wet, dirty, and cold," Person says. "Frogs are most active when the weather is wet."Bring a headlamp. Frogs are also most active at night. Fortunately, their loud nocturnal croaking makes it easier to find them. A headlamp (available at camping stores for as little as $12) will help you navigate with your hands free and light your subject as you creep up on one.Rock and roll. If you're handholding the camera, Person recommends rocking back and forth on your heels to focus instead of adjusting the focusing ring-a faster and more accurate method for a macro lens. If using a tripod, try a focusing rail.Diffuse your flash. You'll need to use a flash at night, and a diffuser casts a more flattering light. For shoe-mount flashes, try a stick-on model, such as the LumiQuest Mini Softbox ($20, street).Set aperture-priority mode. Given the shallow focus of a macro lens, you should create as much depth of field as possible by using the smallest aperture you can-as little as f/22-to get the entire frog in focus.Start a frog sanctuary. Finding the critters is the hardest part, especially in the wild. If you have a pond or the space and resources to build one, try catching tadpoles and starting your own frog refuge.