John Riley reviews the Laowa C-Dreamer 9mm f/2.8 ZERO-D ultra-wide angle and compact lens for APS-C mirrorless cameras.

Key specs Type: Prime lens Focal length: 35mm Maximum aperture: f/1.4 Lens mount: Canon RF Weight: 19.58 oz / 555 g Dimensions: 3.01x3.90 in / 76.5x99.3 mm Filter thread: 67mm Release date: June 2024 ...

news Sigma 50mm F/1.4 DG DN | Art Lens Announced The all-new 50mm f/1.4 DG DN | Art is the latest lens to join Sigma's growing line-up of fast-aperture DG DN Art primes 7 Feb 2023 2:48PM ...

Key Background The strongest geomagnetic storm in the last two decades disrupted Earth’s magnetic field in May 2024, bringing the northern lights to Texas and Florida, according to NASA.

WASHINGTON, April 24, 2025 /PRNewswire/ -- The U.S. Consumer Product Safety Commission (CPSC) is warning consumers to immediately stop using Shenzhen Xiaoju Technology Company Magnetic Balls.

Wide-angle lenses, an aperture or F-stop of four or less and a focus set to the farthest possible setting are recommended for capturing aurora borealis, photographers told National Geographic.

When it comes to the Aperture (f/stop) this should be a small aperture (high f-number, for example f/8 or f/11) as it creates a deeper depth of field.

For example, an F/1.8 aperture will blur the background more than an F/3.5 aperture. In the case of the iPhone, the cameras and software determine how far everything is in the picture.

F.K. Sweet, with a current enrollment of 448 students, is at about 58% of its capacity of 777 students, according to the district. As a magnet school, it has no defined attendance zone, but ...

Click the top-right-hand corner to enlarge the image (Image credit: Digital Camera World) The f-stop number actually refers to the size of the aperture opening, calculated by dividing the lens's focal ...

An aperture ring allows you to set the f-stop directly from the lens as opposed to a camera control dial. Example: Fujinon XF 8mm F3.5 R WR OIS is short for optical image stabilization.

The Panasonic Leica Summilux DG 15mm f/1.7 ASPH features a manual aperture ring (Image credit: James Abbott) A focus switch on the side provides direct control of focusing (Image credit: James Abbott) ...