The fresnel lens gives a wash of light, perfect for overhead portraits or backgrounds. The tighter the focus, the brighter the light. In front of that are slots for a gel filter in thin frames and for ...

Researchers introduce a cost-effective method for producing optical Fresnel zone plate lenses, using colored photoresists for enhanced light manipulation.

The Nanlux Evoke 5000B is being touted as the world's first 5000W Stormproof LED bi-color spotlight with Green/Magenta ...

The viewfinder meanwhile uses a lens, a mirror, and a Fresnel lens, and if you think this might look a little familiar it’s because he’s based it upon his previous clip-on viewfinder project.

The full-band spectral information of samples of multiple physical states can be measured using existing instruments, yet it is difficult for the full-band instrument to be widely used in grain ...

Researchers have fabricated and tested flat lenses called Fresnel zone plates (FZPs), but did so for the first time using only common semiconductor manufacturing equipment, the i-line stepper ...

Welcome to our Independent Lens Brand Book. We’re excited and grateful that you’re here to explore it. With your help, we can keep the Independent Lens brand vital and strong. Now, if you’re ...

A large dog may weigh 50 to 90 pounds, while a giant breed weighs anywhere from 90 to 180 pounds. Given their substantial size and weight, big dogs require a bed made with high-quality foam to ...

and all the other important factors that go into making a lens great. Our reviews give you all the information you need to make the best choices, with full-size sample photos.