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  2. Sony α7 - Wikipedia

    en.wikipedia.org/wiki/Sony_α7

    The Sony α7 and α7R have the model numbers ILCE-7 and ILCE-7R respectively. In addition, the α7S, the α7 II, and the α7R II have the model numbers ILCE-7S, ILCE-7M2, and ILCE-7RM2. Sony's new model naming prefix strives to unify model names. "ILC" stands for Interchangeable Lens Camera, followed by an indicator of A-mount "A" or E-mount "E ...

  3. Low-key lighting - Wikipedia

    en.wikipedia.org/wiki/Low-key_lighting

    Low key light accentuates the contours of the subject by throwing areas into shade while a fill light or reflector may illuminate the shadow areas to control contrast. [2] [1] The relative strength of key-to-fill, known as the lighting ratio, can be measured using a light meter. Low key lighting has a higher lighting ratio, e.g., 8:1, than high ...

  4. f-number - Wikipedia

    en.wikipedia.org/wiki/F-number

    The f-number N is given by: = where f is the focal length, and D is the diameter of the entrance pupil (effective aperture).It is customary to write f-numbers preceded by "f /", which forms a mathematical expression of the entrance pupil's diameter in terms of f and N. [1]

  5. LTV A-7 Corsair II - Wikipedia

    en.wikipedia.org/wiki/LTV_A-7_Corsair_II

    The LTV A-7 Corsair II is an American carrier-capable subsonic light attack aircraft designed and manufactured by Ling-Temco-Vought (LTV).. The A-7 was developed during the early 1960s as replacement for the Douglas A-4 Skyhawk.

  6. Stray light - Wikipedia

    en.wikipedia.org/wiki/Stray_light

    There are many sources of stray light. [6] For example: Ghost orders in diffraction gratings. These can be caused by periodic variations in the spacing of grooves in ruled gratings, for instance. Light scattered towards a telescope from particles along the optical path to a star. Light emitted by components of the optical system.

  7. Strong CP problem - Wikipedia

    en.wikipedia.org/wiki/Strong_CP_problem

    The strong CP problem is solved automatically if one of the quarks is massless. [7] In that case one can perform a set of chiral transformations on all the massive quark fields to get rid of their complex mass phases and then perform another chiral transformation on the massless quark field to eliminate the residual θ-term without also introducing a complex mass term for that field.

  8. Photic sneeze reflex - Wikipedia

    en.wikipedia.org/wiki/Photic_sneeze_reflex

    The photic sneeze reflex (also known as ACHOO syndrome, a contrived acronym for Autosomal-dominant Compelling Helio-Ophthalmic Outburst [1]) is an inherited and congenital autosomal dominant reflex condition that causes sneezing in response to numerous stimuli, such as looking at bright lights or periocular (surrounding the eyeball) injection.

  9. One More Light Live - Wikipedia

    en.wikipedia.org/wiki/One_More_Light_Live

    One More Light Live is the third live album by American rock band Linkin Park, released on December 15, 2017. Recorded during the band's European leg of their One More Light World Tour in 2017, this is the first release since the death of lead singer Chester Bennington .