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2. 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 ...

3. Loupe - Wikipedia

   en.wikipedia.org/wiki/Loupe

   Typical magnifications for viewing slides full-frame depend on image format; 35 mm frames (24×36 mm slides to 38×38 mm superslides) are best viewed at ca. 5×, while ca. 3× is optimal for viewing medium format slides (6×4.5 cm / 6×6 cm / 6×7 cm). Often, a 10× loupe is used to examine critical sharpness.

4. Magnifying glass - Wikipedia

   en.wikipedia.org/wiki/Magnifying_glass

   The eye can then be a larger distance away, and a good image can be obtained very easily; the focus is not very sensitive to the eye's exact position. The magnifying power in this case is roughly MP = (0.25 m)Φ. A typical magnifying glass might have a focal length of 25 cm, corresponding to an optical power of 4 dioptres. Such a magnifier ...

5. Coddington magnifier - Wikipedia

   en.wikipedia.org/wiki/Coddington_magnifier

   A Coddington magnifier is a magnifying glass consisting of a single very thick lens with a central deep groove diaphragm at the equator, thus limiting the rays to those close to the axis, which minimizes spherical aberration. This allows for greater magnification than a conventional magnifying glass, typically 10× up to 20×. Most single lens ...

6. Elijah Wood Hints He's Married, Says He Is 'Beyond Grateful ...

   www.aol.com/elijah-wood-hints-hes-married...

   Elijah Wood may have tied the knot to Mette-Marie Kongsved!. During an episode of the Inside of You with Michael Rosenbaum podcast published on Jan. 6, the Lord of the Rings actor, 43, said he is ...

7. Dioptre - Wikipedia

   en.wikipedia.org/wiki/Dioptre

   The magnifying power V of a simple magnifying glass is related to its optical power φ by V = 0.25 m × φ + 1 {\displaystyle V=0.25\ \mathrm {m} \times \varphi +1} . This is approximately the magnification observed when a person with normal vision holds the magnifying glass close to his or her eye.