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2. Magnifying glass - Wikipedia

   en.wikipedia.org/wiki/Magnifying_glass

   Magnifying glass on an arm lamp. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them. The magnifying power is equivalent to angular magnification (this should not be confused with optical power, which is a different

3. Prayer nut - Wikipedia

   en.wikipedia.org/wiki/Prayer_nut

   Most are 2–5 cm in diameter and designed so they could be held in the palm of a hand during personal devotion or hung from necklaces or belts as fashionable accessories. Prayer nuts often contain central scenes depicting episodes from the life of Mary or the Passion of Jesus . [ 2 ]

4. Magnification - Wikipedia

   en.wikipedia.org/wiki/Magnification

   The maximum angular magnification (compared to the naked eye) of a magnifying glass depends on how the glass and the object are held, relative to the eye. If the lens is held at a distance from the object such that its front focal point is on the object being viewed, the relaxed eye (focused to infinity) can view the image with angular ...

5. Gothic boxwood miniature - Wikipedia

   en.wikipedia.org/wiki/Gothic_boxwood_miniature

   The polyptychs are typically 10–13 cm (3.9–5.1 in) in height. Most of the beads are 10–15 cm (3.9–5.9 in) in diameter and designed so they could be held in the palm of a hand, hung from necklaces or belts, or worn as fashionable accessories. Boxwood miniatures were highly prized in the early 16th century.

6. Traditional handheld refractometer - Wikipedia

   en.wikipedia.org/wiki/Traditional_handheld...

   A traditional handheld refractometer is an analog instrument for measuring a liquid's refractive index. It works on the critical angle principle by which lenses and prisms project a shadow line onto a small glass reticle inside the instrument, which is then viewed by the user through a magnifying eyepiece.

7. Loupe - Wikipedia

   en.wikipedia.org/wiki/Loupe

   A photographic loupe for examining film and prints. A loupe (/ ˈ l uː p / LOOP) is a simple, small magnification device used to see small details more closely. [1] They generally have higher magnification than a magnifying glass, and are designed to be held or worn close to the eye.