The super-wide, super-fast and super-distorted 7Artisans 10mm f/2.8 II ultra-wide prime is equally brilliant for astro and creative photography – and if that wasn't enough, it glows in the dark!

Artisans has announced the 10mm F2.8 II, a full-frame fisheye lens for Canon RF, Nikon Z, Sony E and L-mount camera systems, ...

The 50mm aperture on the Nikon Action EX means that you should get plenty of light when you're using these binoculars. Pack in some multi-coated lenses and high-refractive-index prisms and they're ...

By contrast (no pun intended), phase-detect AF uses a system of prisms, lenses ... when shooting with our Sigma 70mm f/2.8 prime lens, the Nikon D7000 has a shutter lag of only 0.238 second ...

As with most DSLRs, the Nikon D90 has an optical viewfinder that lets you view your subject through the lens. Following a popular trend though, it also offers a Live View mode, in which the mirror ...

Nikon's annual Small World competition showcases images of a world that humans can't usually see, as captured through the lens of a microscope. Each year, rigorous science and dazzling artistry ...

Generally speaking, we recommend looking for multi-coated optics and a Bak-4 prism design for high-quality ... to the best Bushnell binoculars deals, Nikon binoculars deals, Leica binoculars ...

This was made possible through the understanding of the basic principles of optics and the work of skilled glassmakers who constructed prism tiles, deck prisms, and vault lights. These century-old ...

Prism Reading helps learners develop a range of academic and critical thinking skills to build confidence and prepare for college courses. Captivating readings, videos, academic reading skills, ...

Central sharpness is excellent at f/2.8, outstanding from f/4 to f/8 and excellent at f/11 and f/16. The edges are excellent from f/2.8 to f/8 and very good at f/11 and f/16. The blue column ...

f/2.8, f/4 and f/5.6) to see how sharpness and bokeh compares at the various settings. I also dug out my old F-mount 50mm f/1.4 lens, which I've previously used with a Nikon D800 DSLR, and took ...

A prism is a solid shape that has the same cross-section all the way through. These three shapes are prisms. The first has a circular cross-section. The second has a rectangular cross-section.