Rheumatoid factor (RF) levels above a normal range can indicate autoimmune conditions, such as rheumatoid arthritis (RA). Rheumatoid factor (RF) is an immune system protein that attacks healthy cells.

Jon has first-hand experience testing home energy products such as portable power stations, home battery solutions and smart thermostats. Jon has showcased his expertise live on TV for news ...

Do you use a Canon EOS R mirrorless camera? From wide-angle to telephoto, these are the best lenses we've tested for the platform. Images, and the devices that capture them, are my focus. I've ...

The best smart thermostats can make heating and cooling more convenient, and maybe save you money too. By allowing you to remotely control your home temperature, they can help reduce your energy ...

I’ve been working with computers for ages, starting with a multi-year stint in purchasing for a major IBM reseller in New York City before eventually landing at PCMag (back when it was still in ...

A smart thermostat can help you save a considerable chunk of money by reducing your heating and cooling costs while allowing for convenient app and voice controls. However, not all smart ...

With the advent of this RF 16-28mm, there are no less than five full-frame options plus an RF-S wide-angle zoom for APS-C format cameras, and that’s not counting all of the back-catalog EF mount zooms ...

Christina is a freelance editor and contributor with Newsweek’s small business team. With a passion for small business optimization and strategy, Christina has successfully launched her own ...

The debate over the ideal thermostat setting has been battled in homes for as long as the HVAC system has existed. Depending on what kind of HVAC system you have and how well you handle the cold ...

It's an ultra-wide zoom lens designed for full-frame cameras like the Canon EOS R8 Its design is practically identical to that of the RF 28-70mm F2.8 IS STM It costs $1,149 / £1,249 / AU$1,879 ...

Do you forget to turn down your heating when you leave the house? Or you turn up your thermostat as high as it can go when you feel the chill? If you’re doing these things, you’re making some ...