Zoom lenses that work this way are known as optical zooms. Digital zooms, in digital cameras, mimic the same process using computer software, effectively scaling up a smaller part of the original image (when they zoom in) or using a bigger part of that image (when they zoom out). Unlike...
including the Fresnel type, can affect how polarized light passes through. Additionally, lenses can sometimes cause chromatic aberration, where different colors of light focus at different points. It's a challenge that lens designers constantly work to overcome. ...
In addition, lenses can be made to correct for double vision when the eyes do not work together ("crossed eyes"). The lenses do this by moving the image to match the wayward eye. Corrective lenses, then, are prescribed to correct for aberrations, to adjust the focal point onto the retin...
Camera distortionis an unavoidable part of taking pictures. High-end lenses can make lens distortion indiscernible, but the way a lens works makes a zero distortion lens impossible (at least for now). By understanding lens distortion and working with photography editing programs, you can reduce th...
Most lenses have a filter thread in the front where you can screw on camera lens filters. These filters cover a range of options, including adding tints or darkening a scene.
As centuries went on, inventors from all around the world worked on developing new types of lenses and frames that would alleviate the problems with many optical defects of the eye. Famous American inventor and polymath Benjamin Franklin is credited as the discovered bifocals – lenses that have ...
The new process for the coating of binocular lenses and prisms which is described in this article has been rather generally adopted for military work and gives promise of being of value also in forestry work. Publication of this article and of a previous oneby Mrs. Reichert does not of ...
How Transitions lenses work Transitions infuses their lenses with trillions of photochromic molecules that change structure when exposed to UV rays. The molecules’ reaction to UV exposure causes the lenses to darken. Using an exclusive, patented formula, the molecules can sense the level of UV exp...
It is the first and most powerful lens in the eye's optical system. Needs to be protected from accidents, infections or genetic defects. D: Crystalline Lens Just behind the cornea: it keeps the world in focus on your retina. A cataract is the clouding of this lens. E: Eyeball ...
1933: Ernst Ruska builds the first electron microscope that is more powerful than an optical microscope. 1935: Max Knoll builds the first crude SEM. 1935: Working at the University of Toronto, James Hillier and Albert Prebus build on Ruska's work to produce the first commercially successful TE...