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 ...

What is depth of field? Understanding depth of field is one of the first big hurdles in photography. Knowing how your aperture, focal length and focusing work together to affect depth of field and ...

Photography blogger Lau offers a plain-English explanation of two of the most confusing concepts in photography: aperture and focal length. A highlight: Lenses with larger apertures are faster because ...

NEWARK, N.J., June 1, 2021 /PRNewswire/ -- Panasonic is pleased to introduce a new large-aperture standard fixed focal length lens, the LUMIX S 50mm F1.8 (S-S50), as the second addition to the series ...

The Stellarvue SVX 102T is a 4-inch (101.5 mm) aperture, f/7 refractor telescope (714mm focal length), weighing 9.8 pounds (4.4 kg) with adapters, and measuring 23.5 inches (59.7 cm) in length ...