If texture shows in your photo, then you probably have focused more on the background than the fly. Make sure the fly is in focus, and your f-stop is wide open. You won't have any more trouble with the background grain.
If texture shows in your photo, then you probably have focused more on the background than the fly. Make sure the fly is in focus, and your f-stop is wide open. You won't have any more trouble with the background grain.