which has a slightly lower zoom ratio compared to typical kit lenses, but this lens starts wider than most (17mm or about 26mm equivalent) and is also much faster than most (f/2.8 constant maximum ...

Looking to get your contact lenses without leaving your house? These are the best places to buy contacts while saving time and money. Nasha is a Managing Editor for CNET, overseeing our sleep and ...

Smart, connected contact lenses are in the works, and they can do everything from record video to keep your entire body in better health. It’s straight out of a television show: contact lenses ...

Save $60 and get the Celestron TrailSeeker 8x42 binoculars for $239.95 at Amazon — but you'll have to be quick as we've seen ...

Lenses are available in different packs, depending on whether they are monthly or daily contacts and the brand. It also offers eye exams. Prices for contact lenses range from $37 to $165.

we know we can always raise a fire. If Fresnel lenses interest you, we’ve taken a look in the past at their history.

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 ...

At least with the Micro Four Thirds format lenses that Olympus currently offers: We've heard that using the "video rated" 14-140mm zoom lens that Panasonic ships with their DMC-GH1 camera greatly ...

The transmitted light rays then form a real or virtual image of the object. Lenses can be classified into two broad types: positive (or converging) and negative (or diverging) lenses. Positive lenses ...

The best binoculars for stargazing need high magnification and large, light-gathering lenses to view distant starlight — find the best picks before Black Friday. The best binoculars for ...

What you hope to use your binoculars for will also impact the type you're looking for: If you primarily want to stargaze, for example, you'll want large objective lenses that will let in as much ...

If you're looking to upgrade more of your camera accessories, check out our guides to the best lenses for astrophotography and the best camera backpacks. Best overall Best overall This is a great ...