The camera is in the right place and still can't see. A downspout crosses the view, the gutter cuts the top off the frame, or a deep eave puts the lens behind the fascia.
Blocked from below? A drop extension lowers the camera past whatever's in the way — 4, 6 and 8 inch lengths, and a 14-inch version built into a slim mount.
Too tight to the wall? A standoff pushes the camera out far enough to look along the wall instead of into it.