The achromatic doublet lens is used to minimize or eliminate chromatic aberration. Its achromatic design also helps to minimize spherical aberration. Compared with a single lens, an achromatic doublet ...

The wavelengths generally are in red and blue colour. The most commonly used and the earliest example of an achromatic lens is the achromatic doublet. An achromatic doublet is made from a pair of ...

The Svbony SV503 is solidly built and coated with fine-grained paint to give it a premium polished finish. The telescope has an ED doublet lens (ED stands for extra-low dispersion) which helps bring ...

Canon is set to expand its RF-mount lens line up with three new 'hybrid' lenses for its mirrorless cameras. In a teaser, the camera giant posted a picture (above) of its two existing hybrid lenses ...

Here’s how it works. The best iPhone lenses can quickly boost the quality of your smartphone photos and videos. Both the new iPhone 16 Pro models feature 5x telephoto lenses, while older iPhone ...

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 fit and feel of contact lenses are very nuanced, and it can take some trial and error to make sure they’re just right. You want lenses that offer precise vision ...

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 ...

We've rounded up the best budget telescopes under $500 so you can enjoy October's spectacular comets, planets and more — whatever your budget. If you are on a tight budget, the best telescopes ...