The spyglass is a handheld device, similar to a telescope, seen throughout the How to Train Your Dragon franchise.
A spyglass is first seen in the episode, "Alvin and the Outcasts". While Hiccup and Astrid are discussing their dragons on a cliff on Berk, Astrid sees something on the sea nearby that appears to be a ship. Hiccup pulls out a spyglass from an unknown pocket and inspects the vessel, revealing it to be an enemy Outcast ship.
A spyglass is also seen in the episode, "Dragon Flower" when Hiccup offers one he made to Johann in trade for a jar of squid ink. Johann refuses the trade however, reminding Hiccup that he's already traded five just like it, yet he still only has two eyes.
In "Breakneck Bog", Hiccup is seen using a spyglass that Tuffnut acquired from Johann's ship to take a closer look inside a cave where Smothering Smokebreaths are nesting to find and repossess a chest.
Mulch and Bucket are seen using a spyglass at the beginning of the episode, "Have Dragon Will Travel, Part 1". They are watching an unknown Dragon Rider on a Razorwhip attacking a ship. Later, in the same episode, Hiccup uses one to spy on Heather's activities.
Hiccup uses a spyglass in the episode, "Defenders of the Wing, Part 1", when inspecting the island called Caldera Cay. The Dragon Riders see a strange village and a large statue of a dragon species they hadn't seen before. It is later revealed to be an Eruptodon.
A spyglass appears nominally in this game, during an assessment period in a 'Defend Berk' activity. The player has 30 seconds to scout the type and formation of ships attacking Berk before sending dragons to defeat the enemy.
Similar to the appearance of a telescope, it is probably made of animal skin, wrapped in a conical shape, with lenses on each side. It is fairly small, as it can be held in the hand with ease, and stored in a satchel easily.
Scoping: Spyglasses are used to see far off things up close so they can be observed in greater detail.
- It is possible that Hiccup invented the spyglass, as he is the only one to use it whilst still living on Berk during Dragons: Riders of Berk and Dragons: Defenders of Berk.
- Tuffnut Thorston likes to use the spyglass to see things as if they were further away.