Abstract: In this report, a sound pressure field focused by a biconcave lens was investigated using the wave theory and the numerical methods of the parabolic equation (PE) method and finite ...

Meike has launched the SE Series 85mm f/1.8 Mark II full-frame autofocus STM lens for Canon EF mount. Interest in street photography has never been higher and in this feature, we take a close look at ...

Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio products, ...

Leica, Panasonic, and Sigma full-frame mirrorless cameras share a common lens system, the L-mount. It's still evolving, but these are the best L-mount lenses we've tested so far. Images, and the ...

Nikon's mirrorless Z system is supported by an expanding lineup of high-quality lenses. We're here to break down what's available and recommend the best optics we've tested. Images, and the devices ...

Nasha is a Managing Editor for CNET, overseeing our sleep and wellness verticals. She is a nutrition, mental health, fitness and sleep science enthusiast. Her passion for mindful and holistic ...

The eye's crystalline lens helps focus light onto the retina to see clearly. As lenses age, they lose flexibility, leading to presbyopia, which hampers near vision. Cataracts, or clouding of the lens, ...

The best protection filters don't need to do anything at all except take the bangs, knocks, and scratches that might otherwise wreck a very expensive lens! Simply put, they're one of the most ...

Choosing the best Nikon lenses for DSLRs means answering a couple of questions – but don't worry, they're not difficult! The first thing to establish is what sensor size your camera uses – full frame ...

Aim To determine if ‘Defocus Incorporated Multiple Segments’ (DIMS) spectacle lenses slow childhood myopia progression. Methods A 2-year double-masked randomised controlled trial was carried out in ...