"smcp-A 645 135mm F4 Leaf Shutter The PENTAX smcp-A 645 135mm F4 telephoto leaf shutter is ideal for product photography because of its f/4 maximum aperture. This manual focus lens offers a ...

"The SMC PENTAX-A 600mm f/5.6 ED (IF) lens meets professional standards by incorporating Extra-low Dispersion (ED) optical elements to produce a sharp, crisp image with minimal chromatic aberration.

"It started off very promising… but it is still too early to say" Pentax says of its film camera, following decline in sales ...

Pentax – the last brand standing in the DSLR arena, having steadfastly refused to transition to mirrorless – has admitted ...

(From Pentax lens literature) The Pentax SMC P-FA 28-70mm f/2.8 zoom lens is ideal for advanced amateurs and professionals. It provides wide-to-telephoto zoom coverage and high-quality image ...

(From Pentax lens literature) The Pentax SMC P-FA 80-200mm f/2.8 ED IF lens is a moderate to long telephoto lens flexible enough to use in a variety of situations including sports and portrait ...

Nasha is a Managing Editor for CNET, overseeing our sleep and wellness verticals. She is a nutrition, mental health, fitness and sleep science enthusiast. Her passion for mindful and holistic ...

The fit and feel of contact lenses are very nuanced, and it can take some trial and error to make sure they’re just right. You want lenses that offer precise vision ...

Here’s how it works. The best iPhone lenses can quickly boost the quality of your smartphone photos and videos. Both the new iPhone 16 Pro models feature 5x telephoto lenses, while older iPhone ...

An optical lens is a transparent optical component used to converge or diverge light emitted from a peripheral object. The transmitted light rays then form a real or virtual image of the object.

Canon is set to expand its RF-mount lens line up with three new 'hybrid' lenses for its mirrorless cameras. In a teaser, the camera giant posted a picture (above) of its two existing hybrid lenses ...

Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object ...