What tool is typically used as a magnifier for jewelry and photography?

A loupe is a small, handheld magnifying glass designed to provide a closer view of small objects, making it particularly useful for inspecting jewelry and photography details. Loupes are essential in the jewelry industry for examining gemstones and intricate details in craftsmanship, as they allow jewelers and collectors to assess the quality and clarity of stones. In photography, a loupe can be used to check focusing and details in prints or film negatives, supporting photographers in image evaluation.

Other tools listed have specific functions that do not involve magnifying objects. Calipers are used for measuring dimensions precisely, a soldering iron is employed in welding or joining materials, and a mandrel is primarily used for shaping materials or creating consistent curves in metalworking. These tools serve distinct purposes that do not align with the magnification function of a loupe.