Big news here for Leica L-Mount shooters as Sirui has shared the news that the company (and its high-quality lenses) will be ...

The Viltrox AF 25mm f/1.7 Air adds to a growing range of compact, lightweight and supremely affordable ‘Air’ prime lenses ...

Viltrox has announced that its highly regarded AF 135mm F1.8 Lab lens is now available for Nikon Z-mount. The lens was initially released last fall for E-mount, offering a much more affordable prime ...

Meike has introduced its 85mm F1.8 Full Frame Autofocus Portrait Lens for Fuji X-mount cameras, offering advanced optical ...

This lens shares an 82mm filter attachment thread with the Z 50 ... Matthew Richards As promised, the 11-blade aperture diaphragm helps to retain a well-rounded appearance to bokeh disks when stopping ...

The Sony FE 400-800mm F6.3-8 G OSS is a big but manageable telephoto zoom for wildlife photography, although a slow maximum aperture limits its potential for sports.

The abdominal aorta begins after the aorta passes through a muscle called the diaphragm, at the level of the twelfth thoracic vertebra (a spot in the upper abdomen). From there, it travels downward, ...

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

Nikon’s Z-series lens line-up has never been healthier. If you’re shooting with one of the best Nikon cameras, you’ll want to pair it with the best glass you can buy. That’s exactly what ...

The question is, though: Are you breathing efficiently? The answer to that depends on whether or not you’re fully using your diaphragm, a key breathing muscle. Like any muscle of the body ...

Wildlife and sports are two areas where these cameras excel. The relative low weight of these camera bodies and Panasonic’s excellent Lumix G lenses, not to mention their affordability compared to ...

Sigma presents the world’s first mirrorless lens with an approximate zoom ratio of 18.8x. Powerful yet portable, the 16-300mm F3.5-6.7 DC OS | Contemporary delivers outstanding results in any ...