The Equivalent Focal Length term is NOT the lens that is used on the digital, but instead is used on the 35 mm film camera so that it will see the Equivalent size view as the digital camera and its lens. The larger sensor captures the full size image from the lens, not cropped, but...
Simply put, they have a short focal length and thus a widerfield of view. Wide angles can come as fixedprime lensesor wide angle zoom lenses. To better understand wide lenses, it is important to understand how it compares to other lenses both technically and visually. Before we get into t...
The o formulae serve different purposes as explained in the first question. The lens makers formula is used to calculate the focal length of a spherical lens after the refractive index of the lens material and its surface curvature are known. After knowing the focal length of th...
The explained definition delivers a focal length which can also be used in equations for the size of the focus (see below), for example. Note that the locations of the left and right edges of the optical system (e.g. positions of outer lens surfaces, optical windows etc.) or its housin...
While 20mm is my normal preferred focal length for stills with this lens I shoot all my walk-through videos at 16mm. Continuous focus controlled by the camera keeps everything in focus as I walk through the house filming.Here are the downsides:1) Bar...
Fresnel lens, succession of concentric rings, each consisting of an element of a simple lens, assembled in proper relationship on a flat surface to provide a short focal length. The Fresnel lens is used particularly in lighthouses and searchlights to concentrate the light into a relatively narrow...
iPhone Lenses Explained: Wide, Ultra Wide & Telephoto Credit: Apple What is the difference between the wide, ultra-wide, and telephoto lenses on the iPhone? The wide, ultra-wide, and telephoto lenses on the iPhone offer different perspectives and functionalities, allowing you to capture a wide...
The lens (focal length F) that focuses the pulses into the HHG gas cell is placed at a distance F behind the point where the beams cross. This geometry ensures that the two beams run parallel to each other behind the lens. Both beams focus near the end of the gas cell with a small...
Focallengthparameter:thefocalrangeofthelens,theunit ismm; Apertureparameter:representsthemaximumaperturefactorof thelens,andsomelensesalsoindicatetheminimumaperture factorofthelens; Features:showthecharacteristicsofthelensusedtechnology, etc.,thisisthefocusofthearticleexplainedlater. Theusualformatoftheinformationissh...
the vertical plane 45. The horizontal plane 46, however, is not a plane of symmetry. This arrangement of lens elements allows the sensing device to provide wide-angle, long range infrared detection which is useful, for example, over a "pet alley", as will be explained in more detail ...