\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

The lens is detected by Xiaomi's LaserLink technology, which connects the device to the camera interface so you can use it on the touchscreen. Xiaomi's MOS consists of a 100MP Light Fusion X Micro ...

But could you be using something better? The kit lenses you get with a new camera tend to be light and compact and deliver decent image quality, covering all your basic needs when you start taking ...

When TechRadar started testing photography kit two decades ago, $1000 didn’t get you big specs. A lot has changed: in 2025, you can get a whole lot of camera for $1000 or less. From premium ...

Sony stole a lead on other manufacturers in the full-frame mirrorless market, and it’s had more time to build up a wide array of companion lenses to suit every need and budget. I've always been a big ...

If you want to shoot in lower light, with a wider viewpoint, or closer, you’ll need to invest in new lenses. This guide will point you in the right direction for filling your camera bag with ...

The TG-7 continues the tradition with a useful 24-100mm f/2.0-4.9 zoom lens that does a good job for underwater, low-light, and macro photography. The camera is practically indestructible and can ...

This is happening as President Trump tasks the Space Force and other defense agencies to develop a "Golden Dome" missile defense shield, with sensors and space-based interceptors capable of taking ...

It also features the use of both Air Sphere and Sub-wavelength coatings to reduce the likelihood of incident light or internal reflections from lowering image contrast. Like the other lenses in the ...

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Forty years after President Ronald Reagan first conceived the idea, defense industry leaders say the technology is finally advanced enough to build an invisible protective dome of space-based ...

US military officials are scrambling to develop a “Golden Dome” defense system that can protect the country from long-range missile strikes and have been told by the White House that no ...