Thats the deal I had with my first cam (moultrie)
Try this set the cam up and about 10-15 ft in front of it walk by starting out fast and geting slower each pass.
I dont think you will be very pleased with the trigger speed= Time camera wakes up and snaps a picture.
See the picture if this deer was 4 ft closer it would take a super fast trigger time to catch him as he's hauling but. this cam has around 1-1.2 second trigger.