Watch the video: What is focal length? Take two 50mm lenses: an f/1.8 and an f/1.2. Even though they both have the same 50mm focal length, they're not the same physical length – and neither of them is ...

Panasonic is pleased to introduce the new LUMIX S 40mm F2 (S-S40), an interchangeable lens based on the L-Mount system ...

B&H is pleased to introduce the latest M-System lens, the revolutionary Noctilux-M 35mm f/1.2 ASPH. A generational leap in performance, this is the fastest 35mm lens in the M-System to date. With a ...

Sports photogs aren't compensating for something by swinging gigantic, monopod-mounted lenses; they need the focal length. Focusing and zooming on outfielders usually means glass far from the camera ...

On Apple's iPhone 15 Pro models, the Main camera now allows users to switch between three focal lengths when shooting. Keep reading to learn how it works. To take advantage of the enhanced camera ...

When you use DPReview links to buy products, the site may earn a commission. The Panasonic Lumix S 40mm F2, pictured on an ...

This article is the third in a series teaching the basics of photography. We started by learning about the properties of light and how an image is created, and we also learned how a lens bends light ...

I recently tested the astroimaging capability of the 20mm Sigma f1.4 DG HSM Art lens with my two DSLR cameras. Released in fall 2015, this Sigma lens has 15 elements in 11 groups. The optics contain ...

Focal length is the optical distance in millimeters between a camera lens and the sensor or film. It determines the height and width of the scene being captured, known as the "field of view." A prime ...

Indicates the magnification and angle-of-view of a lens. The human eye sees things roughly the same as a 43mm focal length of a lens for a 35mm camera. Anything shorter is classed as a wide-angle, ...