As the paper gets farther away from your eye, the visible portion of the room becomes much smaller. Similar design considerations must be made on the remote s side. That s why you ll find many remotes use emitters that are completely open, or placed in a plastic bubble that allows them protected but superior exposure. Room conditions can also affect infrared performance. Walls lined with absorbing materials such as brick or fabric will absorb infrared light rather than reflect it elsewhere.
Batteries matter too.
Just as low batteries in a flashlight will produce a dim beam, remote controls really operate best with a full power source. Even though a remote may appear to be working fine otherwise, if you find the range seems to have diminished over time you should replace the batteries with new ones. Chances are you ll see a marked improvement. How we tested. All camera settings were manually maintained for each photograph, ensuring that no automatic compensations were used.