Charles Chevalier created an achromatic lens that could control both chromatic and spherical aberrations. However, this meant that the aperture at the front was quite small (f/16), taking the ...

What we got was a lineup of 15 spotters in a wide range of magnification, objective lenses, sizes, and purposes. Our plan? To ...

Achromats are optical lenses designed to minimize chromatic aberration. Achromats are also known as achromatic lenses. Chromatic aberration is a type of optical distortion which occurs when a lens ...

An achromatic cylindrical lens is composed of a positive low refractive index cylindrical lens and negative high refractive index cylindrical lens cemented together, which can significantly reduce ...

The categories are not mutually exclusive; for example, a spherical lens may also be achromatic. Spherical lenses (or singlets) have curved surfaces which converge or diverge rays. All of the lens ...

It’s hard to know what the world looks like to animals, but scientists have developed a new technology to help with that.

Corrections & Clarifications: A previous version of this story described a directional functionality as a Lens feature, but it is not part of that suite of products from Google. NEW YORK ...

The best iPhone lenses are a sure fire way to take your iPhone photography up a level. Sure, the iPhone 15 Pro has a 48MP sensor, which sounds great on paper, right? Well, ask any professional ...

One tweak recently made to the desktop browser is the addition of a Google Lens button that pops up every time you click inside the address bar. According to Google, this shortcut is intended to ...

Owning one of the best lens heaters is an absolute must if you're shooting in cold conditions to prevent your glass from fogging up. Owning one of the best lens heaters is a must if you're a ...

We've rounded up the best telescopes for a range of different purposes and budgets, from beginner to smart telescopes and everything in between. The best telescopes allow astronomers to access ...

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 ...