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Our top five picks The American Optical Saratoga sunglasses are back after being unavailable for decades. Beautifully designed and with outstanding lenses, it’s no wonder they were JFK’s ...

UV Protection and Clear Vision: Utilizing advanced UV400 lens technology, these mens polarized sunglasses effectively block over 99.9% of harmful UV rays, providing comprehensive protection for ...

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Sony stole a lead on other manufacturers in the full-frame mirrorless market, and it’s had more time to build up a wide array of companion lenses to suit every need and budget. I've always been a big ...

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\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.