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2. Need to Work in the Dark? Turn to One of These Editor ... - AOL

   www.aol.com/done-dark-turn-one-rechargeable...

   Check out our picks for the best USB-charged flashlights for 2024. ... Paired with an adjustable focus, this model is more in line with a flashlight than its rivals. There are four lighting modes ...

3. We Built an Integrating Sphere to Test and Determine the Best ...

   www.aol.com/8-best-flashlights-everyday...

   The ML50L is a good example of why the most lumens don’t always make the best flashlight. The focusing reflector helps this flashlight throw a beam as far as technically brighter lights do, as ...

4. The best gifts under $100 for everyone on your list - AOL

   www.aol.com/lifestyle/the-best-gifts-to-give...

   Relieve tension and melt away stress with Amazon's No. 1 best-selling foot massager. This deep-kneading shiatsu foot massager has two adjustable intensity levels and three massage modes that boost ...

5. Adjustable-focus eyeglasses - Wikipedia

   en.wikipedia.org/wiki/Adjustable-focus_eyeglasses

   Adjustable focus lenses, like single-focus lenses, also reduce image-jump and spatial distortion in the field of view associated with traditional multi-focal lenses. Additionally, the ideal near-vision correction can be achieved with precision, because the variable lenses emulate the focusing action of the youthful (non-presbyopic) eye.

6. Fulton MX991/U Flashlight - Wikipedia

   en.wikipedia.org/wiki/Fulton_MX991/U_Flashlight

   A photograph showing two Fulton MX-991/U Flashlights, next to an unofficial reproduction and a standard angle-head flashlight. The MX-991/U Flashlight (aka GI Flashlight, Army flashlight, or Moonbeam [1]) from the TL-122 military flashlight series of 1937-1944 and is a development of the MX-99/U flashlight issued in 1963 [clarification needed].

7. Zoom lens - Wikipedia

   en.wikipedia.org/wiki/Zoom_lens

   A simple scheme for a zoom lens divides the assembly into two parts: a focusing lens similar to a standard, fixed-focal-length photographic lens, preceded by an afocal zoom system, an arrangement of fixed and movable lens elements that does not focus the light, but alters the size of a beam of light travelling through it, and thus the overall ...