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

Any serious photographer should have a 50mm lens in their kit bag. Also known as a 'standard' prime or a 'nifty fifty,' these lenses capture a perspective that's roughly equivalent to the field of ...

Nikon’s Z-series lens line-up has never been healthier. If you’re shooting with one of the best Nikon cameras, you’ll want to pair it with the best glass you can buy. That’s exactly what ...

Zeiss is returning to making lenses for stills cameras, introducing the Otus ML line with new 50mm and 85mm F1.4 lenses for E, RF, and Z mounts. The lenses are manual focus only, but are focused on ...

Sigma has announced the 300-600mm F4 DG OS Sports lens, designed specifically for applications like sports, action and wildlife photography. Recent Videos Optically, the lens is built around 28 ...

IRAQI military forces engaged in the operation to drive Islamic State (Isis) from Mosul confirmed the liberation of the ancient city of Nimrud yesterday. Mosul operational commander Lieutenant-General ...

I'm a Fitness & Nutrition writer for CNET who enjoys reviewing the latest fitness gadgets, testing out activewear and sneakers, as well as debunking wellness myths. On my spare time I enjoy ...

It became known as the Nimrud Lens, and although other experts say the optical quality of the lens isn’t good enough to be of use, the name stuck. At first glance, this 4th-century Roman glass ...

Others dismissed it as a piece of decorative inlay. Italian scientist Giovanni Pettinato, from the University of Rome, had another theory: that it was a lens from a telescope instrumental to the ...

Instead of manually copying and pasting text or performing a separate search, Google Lens enables you to highlight, draw over, or tap on any part of your screen to initiate a search instantly.

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 ...