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

Realme has revealed its Interchangeable Lens Concept phone at MWC 2025. This phone has a one-inch camera sensor that can be paired with your existing Leica camera lenses. Realme’s phone also ...

The realme Ultra has two camera sensors, along with a 1-inch CMOS sensor, which is used for the interchangeable lens. That’s a Sony IMX989 sensor. Which is used with an ultra-wide Sony IMX890 ...

Albert Einstein, in 1905, presented the revolutionary idea of light quanta of energy which equals ħw, where ħ is reduced Planck's constant. There is plenty of experimental evidence on magnetic ...

Two gargantuan lenses were being shown off at CP+; the Sony FE 400-800mm F6.3-8 G OSS and Sigma 300-600mm F4. Yet in the shadow of those long telephoto zooms for full-frame cameras was a lens that ...

However, the company was also showing off its new 14-24mm F2.8 full-frame lens for Sony E mount and teasing some unspecified future lenses. TTArtisan's most interesting CP+ announcement wasn't a lens ...

Sony has to be losing patience with its Xperia line of smartphones. Year in and year out, Sony brings to the table its new Xperia phones and they just don't sell as well as rival handsets. You can ...

Get Instant Summarized Text (Gist) A new flat telescope lens has been developed that captures color accurately while detecting light from distant stars. Unlike traditional bulky curved lenses ...

It's also compatible with Sony's 1.4x and 2x optical teleconverters, which can give you up to 1600mm of reach at the cost of 2EV of light. The lens weighs 2475g (4.66lb) and accepts 105mm filters.

Sony unveils FE 400-800mm F6.3-8 G OSS and FE 16mm F1.8 G lenses The 400-800mm lens is Sony's first-ever with 800mm reach The full-frame lenses cost $2,900 / £2,550 and $800 / £850 respectively ...

Images, and the devices that capture them, are my focus. I've covered cameras at PCMag for the past 13 years, which has given me a front row seat for the DSLR to mirrorless transition, the ...

Sony E-Mount shooters can now find an impressive 800mm reach in the brand’s E-Mount optics line-up, thanks to a new zoom lens unveiled during CP+ 2025. On Wednesday, February 26, Sony revealed the ...