Binoculars

Binoculars (called Telescopes in Nintendo Power ) are telescopic devices in Super Mario 3D Land. If Mario steps on a green platform in front of it, he can look through the lens and get a view of the whole area. The binoculars are controlled by moving the Nintendo 3DS around using its gyro-sensor control and the player can press or  to zoom out and zoom in, respectively. The player can also look for hidden Toads, and if the Toads are sighted, they will throw out items such as Star Medals, 1-Up Mushrooms, or even Stars. The camera can also be moved about using the on the 3DS. The image within the binoculars appears as 2D even if 3D is turned on.

Binoculars return in Super Mario Odyssey. Here, Mario uses them by capturing them with Cappy, and they launch upward a set distance (due to being tethered by a thin cord) before usage, allowing Mario to view more of the area he's in. In some kingdoms, a peculiar flying object (such as the Sphynx or a taxi) can be spotted in the sky, and zooming onto it with the binoculars will make a Power Moon appear.

Trivia

 * In certain levels in Super Mario 3D Land (such as World 1-3) where the pair of Binoculars are found, the player may be able to spot with them a white UFO that eventually disappears from sight.
 * In the Goomba Spotting minigame in Mario Party 9, the whole minigame seems to have been seen from a pair of binoculars, except at the ending.