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

At a recent event, eye-care industry professionals across the globe convened to discuss the future of vision.

Shoot sports? You'll need one of the best lenses for sports photography – here are the best buys for Canon, Sony, L-mount, Nikon, Fujifilm, Pentax and Micro Four Thirds shooters I've long been into ...

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 ...

This text is written within the context of the research project on the synergies between the green and digital transitions, European Commission Joint Research Centre’s Directorate for a Fair and ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The instant screen search update is rolling out globally on iOS this week. If you use ...