Nikon’s latest addition to its Gold Ring series of professional prime lenses takes the form of the AF-S NIKKOR 105mm f/1.4E ED, a fast-aperture full-frame (FX mount) lens that’s likely ideal for portraiture; as far as I can tell, it’s the fastest Nikon-mount prime available in that focal length. If you feel like mounting it …

The next time you take a break from your labors and check Twitter.com on your computer, you can flit about the social-networking site more efficiently with a few keyboard shortcuts. Here is a baker’s dozen of the most helpful of the bunch. 1. Page down and up As you can on other web pages, hit the spacebar to page down …

“Carpool Karaoke,” a made-to-go-viral segment from “The Late Late Show with James Corden,” is branching out to its own series and will be distributed exclusively by Apple Music. The series will include 16 episodes and be produced by James Corden, CBS Television Studios, and Ben Winston’s production company, Fulwell 73. Corden will not host the series. (Editors’ Note: CNET is …

There’s a wearable for just about everything these days. Fake nails to help you commute. A strap-on chair for tired physicians. A Pokemon Go-connected band. Now there’s a wearable designed to help women trying to get pregnant. Ava, a Swiss startup, on Tuesday started shipping a $199 bracelet that tracks a woman’s fertility cycles and helps her figure out the …

Attention, video addicts: T-Mobile has added 16 new video services to its Binge On streaming program. The company’s program now boasts four times more services than it started with, highlighting Binge On’s rapid growth, the company said Tuesday. T-Mobile customers have streamed 765 million hours (or 87,000 years) of video on the platform since it kicked off in November. Among …

In 2013, Kano debuted its Raspberry Pi-powered DIY computer kit on Kickstarter, with an aim to get kids pumped about coding and computing. Since then, it has raised more than $1.5 million from Kickstarter backers, and its kits will soon be available at Toys R Us and Barnes & Noble. The kit includes a Raspberry Pi 3 mini-computer with accompanying …

Now playing: Watch this: LeEco announces it’s buying Vizio for $2 billion 1:29 Chinese conglomerate LeEco just spent $2 billion to get its foot in the door of the US television market. Along with Samsung, Vizio has been one of the two most-popular TV brands in the US over the last few years. Vizio TVs are among CNET’s most-recommended models. …

Mozilla may finally have a reason for you to check out the Firefox browser for your iPhone. A new version, set for release Tuesday, cuts processor use by 40 percent and memory use by 30 percent, according to the nonprofit organization. The result is a more power-efficient mobile browser that may potentially help your phone run a full day without …

First the pope and now the Democrats. Philadelphia has been a big destination for travelers in recent years. If you weren’t able to score tickets this week to the Democratic National Convention, where Hillary Clinton will make history as the first woman to accept the presidential nomination from a major US political party, have no fear. There’s still plenty to …

Apple will report its quarterly results today, and the numbers shouldn’t be pretty. After riding the mobile wave since 2007, the Silicon Valley giant faces softer profits now that phone sales have slowed. With the upcoming iPhone expected to offer few improvements, Apple’s tough times may continue. Verizon also was hit by a cooler phone market, with the wireless carrier …