How much does Legendary Field Cannon cost in AoE3?

1,500 wood, 1,500 coin, 30 seconds (AoE3: Definitive Edition 100.19.18309).

What does Legendary Field Cannon do in AoE3?

Light Cannon: damage +50%, hit points +50%. The game says: "Legendary upgrade for Light Cannon."

Technology

Legendary Field Cannon

Legendary Field Cannon (tech ID ImpLegendaryLightCannon) is a technology in AoE3: Definitive Edition 100.19.18309 costing 1,500 wood, 1,500 coin, 30 s to research at the Artillery Foundry. Effect: Light Cannon: damage +50%, hit points +50%.

Quick answers (3)

How much does Legendary Field Cannon cost in AoE3?: 1,500 wood, 1,500 coin, 30 seconds (AoE3: Definitive Edition 100.19.18309).
What does Legendary Field Cannon do in AoE3?: Light Cannon: damage +50%, hit points +50%. The game says: "Legendary upgrade for Light Cannon."
What is the tech ID of Legendary Field Cannon?: ImpLegendaryLightCannon.

Legendary upgrade for Light Cannon.

What it does

Light Cannon: damage +50%, hit points +50%

Cost: 1,5001,500
Research time: 30 s
Game ID: ImpLegendaryLightCannon

Researched at

Artillery Foundry

Needs

Field Cannon

Civilizations

Source: techtreey.xml and the Home City files, AoE3: DE 100.19.18309 (build 25040513).