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

At Mobile World Congress 2025, Xiaomi showcased a Modular Optical System (MOS) that magnetically attaches a lens to a custom Xiaomi 15. It's like a Moto Mod, but with a full-fledged, working ...

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 ...

Learn more› By Erin Roberts We will soon update this guide to focus entirely on Canon RF-mount mirrorless lenses, following the structure of our Nikon Z-mount lens guide. Keep an eye out for new ...

Once overshadowed by gold, silver is emerging as a favoured asset. Investors are pouring into silver ETFs, betting on both its safe-haven appeal and industrial demand. For years, gold has been the ...

Canon has announced the RF 20mm F1.4 L VCM ultra-wide prime as part of its L-series "hybrid" prime lenses designed for both stills and video work. Recent Videos The 20mm F1.4 shares many ...

Charles Oakley’s 2017 arrest following a widely publicized incident at Madison Square Garden took a toll on his and Angela Oakley’s marriage. During Sunday’s episode of “The Real ...

When investing, your capital is at risk. The value of your investments can go down as well as up and you may get back less than you put in. The content of this article is provided for information ...

Paras Griffin/Getty Angela Oakley is opening up about challenges in her relationship. In the March 23 episode of The Real Housewives of Atlanta, Angela and her husband Charles Oakley discussed ...

Our lens reviews offer detailed information on sharpness, distortion, bokeh, and all the other important factors that go into making a lens great. Our reviews give you all the information you need ...

To see if $50 could bridge this gap, I recently bought an anamorphic lens for my smartphone, and took it for a spin in both London and Australia. I've used anamorphic lenses on actual video ...

If you're searching for the best Leica M lens for your rangefinder, you have plenty of options to choose from. In this guide, I break down the entire lineup, highlighting the strengths of each lens ...