Please help! I have Nikon 18-55 lens and Nikon D3200 body. Sometimes auto focus is not work when i will turn on the camera. After 5-10 tries it will start to work, and then is no problem. I can focusing. I will turn off the camera, after example 20 min still work without problems. Next day again the same problem. Like hard starting car engine . I don't know what can be the problem. Please answer me. Thanks