A lens focuses light onto the sensor of a digital camera and is critical to photography. To help you make an informed choice when buying or mounting an optic, we explain some of the most important ...

The term ‘crop factor’ arose from a need to help 35mm film SLR photographers understand how their existing lenses would perform on cameras with smaller image sensors than traditional 35mm film. It’s ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Knowing how much of your scene you can capture at each lens' focal length is a conundrum every ...

Sigma has announced a new digital camera series that is called the Sigma dp Quattro. The Quattro name comes from the use of a new Foveon X3 digital image sensor that is of the Quattro generation. The ...