A hand lens is a small device used to magnify something that an entomologist (or other naturalist) is looking at. A hand lens consists of a lens made of a piece of glass or plastic. The lens is usually attached to a frame that can be swivelled so the lens moves inside a protective cover.
Many species of insect can only be identified by viewing very small characteristics. When in the field entomologists often carry a hand lens as this helps them examine small or hard to see characteristics of insects or other invertebrates. In the laboratory entomologists often use a microscope instead of a hand lens.
A hand lens isn't just used by entomologists but by many naturalists who need to view small things in the field and even by jewellers when examining the structure of jewellery.
Other names for (or types of) Hand lens include:
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