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JLab has long made some of the most affordable Bluetooth accessories, but their new Go Pop ANC earbuds are something of a breakthrough. Never before have you been able to buy wireless earbuds with active noise cancellation (ANC) for just $30.

Anti-reflective coatings have vastly improved in recent years. There are now hundreds of different types for each kind of lifestyle and patient need.

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Courtney Dryer, OD, received her doctor of optometry degree from Southern College of Optometry in 2011. She is the owner of Autarchic Spec Shop in Charlotte, NC. She has worked with Eyes on Eyecare since its founding and regularly contributes to optometric publications and vision care websites.

Anti reflective coating lensesreddit

A camera with a single small lens that cannot be adjusted to focus on objects at different distances.In order to have most objects appear in focus, a fixed-focus lens must be very small and have a tiny aperture (opening to the sensor). This allows objects at a wide range of distances to appear in focus.The small lens and aperture limits the amount of light that reaches the sensor, however, which limits photo quality. Auto-focus lenses often allow much better photo quality.There is no maximum focus distance for a fixed-focus lens, only a minimum. In other words, objects at 20 feet away will appear equally in focus as objects 2 miles away, but an object 1 foot away will be blurry. The minimum distance can vary from about 2 feet to 12 feet, depending on the lens.The majority of current cameraphones use fixed-focus lenses.See: Auto-focus

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The process of creating premium anti-reflective coatings requires substantial technology, and looks something like this:

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