enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Parfocal lens - Wikipedia

    en.wikipedia.org/wiki/Parfocal_lens

    Zoom lenses (sometimes referred to as "true" zoom) are ideally parfocal, in that focus is maintained as the lens is zoomed (i.e., focal length and magnification changed), which is convenient and has the advantage of allowing more accurate focusing at maximal focal length then zooming back to a shorter focal length to compose the image.

  3. Oil immersion - Wikipedia

    en.wikipedia.org/wiki/Oil_immersion

    The resolution of a microscope is defined as the minimum separation needed between two objects under examination in order for the microscope to discern them as separate objects. This minimum distance is labelled δ. If two objects are separated by a distance shorter than δ, they will appear as a single object in the microscope.

  4. Objective (optics) - Wikipedia

    en.wikipedia.org/wiki/Objective_(optics)

    One of the most important properties of microscope objectives is their magnification. The magnification typically ranges from 4× to 100×. It is combined with the magnification of the eyepiece to determine the overall magnification of the microscope; a 4× objective with a 10× eyepiece produces an image that is 40 times the size of the object.

  5. Zoom lens - Wikipedia

    en.wikipedia.org/wiki/Zoom_lens

    Many so-called "zoom" lenses, particularly in the case of fixed-lens cameras, are actually varifocal lenses, which gives lens designers more flexibility in optical design trade-offs (focal length range, maximal aperture, size, weight, cost) than true parfocal zoom, and which is practical because of autofocus, and because the camera processor ...

  6. images.huffingtonpost.com

    images.huffingtonpost.com/2010-07-07-10cv4184.pdf

    %PDF-1.4 %âãÏÓ 89 0 obj > endobj xref 89 21 0000000016 00000 n 0000001169 00000 n 0000001250 00000 n 0000001443 00000 n 0000001585 00000 n ...

  7. US judge issues order to reopen Citgo data room, restart bidding

    www.aol.com/news/us-judge-issues-order-reopen...

    A U.S. judge overseeing an auction of shares in the parent of Venezuela-owned Citgo Petroleum on Monday agreed to reopen a data room to allow potential buyers to prepare new bids, a court document ...

  8. Lens - Wikipedia

    en.wikipedia.org/wiki/Lens

    A burning apparatus consisting of two biconvex lens. A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.

  9. King Charles Quips 'I'm Still Alive' at Final Engagement ...

    www.aol.com/king-charles-quips-im-still...

    King Charles cracked a joke about longevity during his final day out for work before the royal family convenes for Christmas.. On Dec. 20, the King, 76, and Queen Camilla attended a reception at ...