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Cable Release
The Bulb setting (abbreviated B) on camera shutters is a momentary-action mode that holds shutters open for as long as a photographer depresses the shutter-release button. The Bulb setting is distinct from shutter's Time (T) setting, which is an alternate-action mode where the shutter opens when the shutter-release button is pressed and released once, and closes when the button is actuated again. History Decades before the first flashbulbs, some box cameras and many view cameras and folding cameras came with a detachable pneumatic shutter release with a rubber bulb on the end; "Bulb" refers to the rubber shutter release bulb. Though mechanically timed exposures could also be triggered by squeezing the shutter release bulb, "Bulb" exposures then had the same momentary action as camera shutters have today, as per this description from Sears Roebuck's 1909 ''Cameras Photographic Supplies'': Around 1894 in Germany, the momentary-action setting on camera shutters made by C. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conley Model C Folding Camera (circa 1909)
Conley from ''O′Conghaile'' or Ó Conghalaigh (“hound valiant”) is a surname of Irish or Manx origin. The anglicized forms Conneely, Connealy, and Cunneely emerged due to the loss of the "gh" sound, which lengthened the second syllable of Conghal. In Connacht, these forms are often shortened from McNeilly, derived from Mac Conghaile. Another possible origin is the West Cork name Mac Coingheallaigh or Ó Coingheallaigh, meaning "faithful to pledges." Historically, O'Connolly was a principal name of County Monaghan. Conley is also used as a male given name, anglicized from Old Irish Conláed, meaning "constant fire," which combines cunnail ("prudent, constant") and áed ("fire"). Alternatively, it could be a compound name from Old Irish cond ("intellect," "mind," or "king") or cenn ("head, chief") and ley, an Anglo-Norman term for "field, meadow, or forest clearing." Conley is a variant spelling of Connelly, Connley, and Connolly. People with the surname Arts and letters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Night Sky
The night sky is the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon. Natural light sources in a night sky include moonlight, starlight, and airglow, depending on location and timing. Aurorae light up the skies above the polar circles. Occasionally, a large coronal mass ejection from the Sun or simply high levels of solar wind may extend the phenomenon toward the Equator. The night sky and studies of it have a historical place in both ancient and modern cultures. In the past, for instance, farmers have used the status of the night sky as a calendar to determine when to plant crops. Many cultures have drawn constellations between stars in the sky, using them in association with legends and mythology about their deities. The history of astrology has generally been based on the belief that relationships between heavenly bodies influence or explain events on Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Image Trigger
An image trigger initiates the capture of single or multiple frames of a digital camera by analysing the signals of its sensor. For capturing and analysing of fast moving objects (e.g. as in quality control of production lines) modern high speed cameras are frequently used. Typically the initiation of an image-series starts as soon as the object is entirely visible in the field of the camera. By using a so-called "image trigger" this task can be done much faster and more accurately, without the cost and effort of additional equipment as in standard methods (for instance, via cable release). The on-board "ImageBLITZ" image trigger uses the live picture of the camera itself as a flexible and accurate sensor, with the result that the process synchronisation takes care of itself. By using CMOS cameras (which provide the information of every single pixel in digitized form) a fast processing of the supplied data is ensured. To prepare the ImageBLITZ, a line segment of a predefined le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olympus OM-D E-M5
The Olympus OM-D E-M5, announced in February 2012, is a Micro Four Thirds The is a standard released by Olympus Corporation, Olympus Imaging Corporation and Panasonic in 2008, for the design and development of mirrorless interchangeable lens digital cameras, camcorders and Camera lens, lenses. Camera bodies are availab ... compact mirrorless interchangeable lens camera. In style and name it references the Olympus OM series of film SLR cameras, but it is not an SLR camera (there is no optical path from lens to viewfinder: a high quality electronic viewfinder is used). The successor is the Olympus OM-D E-M5 Mark II. Awards In April 2012, the enthusiast photography web site Digital Photography Review (DP Review) awarded the OM-D EM-5 a Gold Award. On the same website it was subsequently voted Best Camera of 2012 in a photographers' poll. Other photography news and reviews websites that awarded the OM-D EM-5 "Camera of the Year" for 2012 were ''photographyblog.com'' and ''wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olympus Corporation
is a Japanese manufacturer of optics and reprography products, headquartered in Hachioji, Tokyo. Olympus was established in 1919, initially specializing in microscopes and thermometers, and later in imaging. Olympus holds roughly a 70 percent share of the global endoscope market, estimated to be worth approximately US$2.5 billion. It was formerly also a maker of cameras, camera lens, camera lenses and dictaphones, until it divested this part to OM Digital Solutions in 2020. In 2011, Olympus scandal, Olympus attracted worldwide media scrutiny when it fired its CEO Michael Christopher Woodford for whistleblowing, and the matter snowball effect, snowballed into a corporate corruption investigation with multiple arrests. In 2016, it paid million (equivalent to $million in ) in fines associated with its illegal, long running, Kickback (bribery), kickback scheme. Products Cameras and audio In 1936, Olympus introduced its first camera, the Semi-Olympus I, fitted with the first Z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Film Speed
Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system introduced in 1974. A closely related system, also known as ISO, is used to describe the relationship between exposure and output image lightness in digital cameras. Prior to ISO, the most common systems were ASA in the United States and DIN in Europe. The term ''speed'' comes from the early days of photography. Photographic emulsions that were more sensitive to light needed less time to generate an acceptable image and thus a complete exposure could be finished faster, with the subjects having to hold still for a shorter length of time. Emulsions that were less sensitive were deemed "slower" as the time to complete an exposure was much longer and often usable only for still life photography. Exposure times for photographic emulsions shortened from hours to fractions of a second by the late 19th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Olympus Products
The following is an alphabetically sorted list of products manufactured under the Olympus company brand. Photography Digital cameras Film cameras Lenses Voice Recorders Digital Voice Recorders Microcassette Voice Recorders Minicassette Voice Recorders Digital audio players Software Olympus also sold CAMEDIA Master 4.x which was a photo editor. See also * Timeline of Olympus creative digital cameras * Olympus OM system References External links Olympus Cameras History {{DEFAULTSORT:Olympus products Technology-related lists Lists of photography topics Lists of products ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Digital Camera
A bridge camera is a type of camera that fills the niche market, niche between relatively simple point-and-shoot cameras and interchangeable-lens cameras such as mirrorless cameras and single-lens reflex cameras (SLRs). They are often comparable in size and weight to the smallest Digital single-lens reflex camera, digital SLRs (DSLR), but lack lens mount, interchangeable lenses, and almost all digital bridge cameras lack an optical viewfinder system. The phrase "bridge camera" has been in use at least since the 1980s, and continues to be used with digital cameras. The term was originally used to refer to film cameras which "bridged the gap" between point-and-shoot cameras and SLRs. Like other cameras, most current bridge cameras are digital camera, digital. These cameras typically feature full manual controls over shutter speed, aperture, Film speed#Digital, ISO sensitivity, color balance and metering. Generally, their feature sets are similar to consumer DSLRs, except for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shutter Priority
Shutter priority (usually denoted as S on the mode dial), also called time value (abbreviated as Tv), refers to a setting on cameras that allows the user to choose a specific shutter speed while the camera adjusts the aperture to ensure correct Exposure (photography), exposure. This is different from manual mode, where the user must decide both values, aperture priority where the user picks an aperture with the camera selecting the shutter speed to match, or program mode where the camera selects both. Background Shutter priority with longer exposures is chosen to create an impression of motion. For example, a waterfall will appear blurred and fuzzy. If the camera is panned with a moving subject, the background will appear blurred. When photographing sports or high-speed phenomena, shutter priority with short exposures can ensure that the motion is effectively ''frozen'' in the resulting image. Like aperture priority, this mode allows for partial automation thus decreasing the ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manual Exposure
In photography, exposure is the amount of light per unit area reaching a frame of photographic film or the surface of an electronic image sensor. It is determined by shutter speed, lens f-number, and scene luminance. Exposure is measured in units of lux-seconds (symbol lxs), and can be computed from exposure value (EV) and scene luminance in a specified region. An "exposure" is a single shutter cycle. For example, a long exposure refers to a single, long shutter cycle to gather enough dim light, whereas a multiple exposure involves a series of shutter cycles, effectively layering a series of photographs in one image. The accumulated ''photometric exposure'' (''H''v) is the same so long as the total exposure time is the same. Definitions Radiant exposure Radiant exposure of a ''surface'', denoted ''H''e ("e" for "energetic", to avoid confusion with photometric quantities) and measured in , is given by :H_\mathrm = E_\mathrmt, where *''E''e is the irradiance of the surface, mea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital SLR
A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that combines the optics and mechanisms of a single-lens reflex camera with a solid-state image sensor and digitally records the images from the sensor. The reflex design scheme is the primary difference between a DSLR and other digital cameras. In the reflex design, light travels through the lens and then to a mirror that alternates to send the image to either a prism, which shows the image in the optical viewfinder, or the image sensor when the shutter release button is pressed. The viewfinder of a DSLR presents an image that will not differ substantially from what is captured by the camera's sensor, as it presents it as a direct optical view through the main camera lens rather than showing an image through a separate secondary lens. DSLRs largely replaced film-based SLRs during the 2000s. Major camera manufacturers began to transition their product lines away from DSLR cameras to mirrorless intercha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Painting
Light painting, painting with light, light drawing, light art performance photography, or sometimes also freezelight are terms that describe photographic techniques of moving a light source while taking a long-exposure photograph, either to illuminate a subject or space, or to shine light at the camera to 'draw', or by moving the camera itself during exposure of light sources. Practiced since the 1880s, the technique is used for both scientific and artistic purposes, as well as in commercial photography. Light painting also refers to a technique of image creation using light directly, such as with LEDs on a projective surface using the approach that a painter approaches a canvas. History Light painting dates back to 1889 when Étienne-Jules Marey and Georges Demeny traced human motion in the first known light painting ''Pathological Walk From in Front''. The technique was used in Frank Gilbreth's work with his wife Lillian Moller Gilbreth in 1914 when the pair used sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
