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Graduated Filter
A graduated neutral-density filter, also known as a graduated ND filter, split neutral-density filter, or just a graduated filter, is an optical filter that has a variable light transmission. Typically half of the filter is of neutral density filter, neutral density which transitions, either abruptly or gradually, into the other half which is clear. It is used to bring an overly-bright part of a scene into the dynamic range of film or sensor. For example, it can be used to darken a bright sky so that both the sky and subject can be properly exposed. ND filters can come in a variety of shapes and sizes and densities and can be used in all types of photographic applications from still photography, motion photography and scientific applications. Center-spot filters are ND graduated filters that are slightly opaque in the center and are clear at edges. These are used for special effects or to compensate for light falloff that is natural with large optics. History Graduated filters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GND Demo
GND may refer to: * Graduated neutral density filter * Green New Deal * Ground (electricity) * (Integrated Authority File) * Maurice Bishop International Airport in Grenada * Zulgo-Gemzek language, spoken in Cameroon * Gabriel Nadeau-Dubois, a politician in Quebec {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GND Demo-white-marked , a politician in Quebec
{{disambiguation ...
GND may refer to: * Graduated neutral density filter * Green New Deal * Ground (electricity) * (Integrated Authority File) * Maurice Bishop International Airport in Grenada * Zulgo-Gemzek language, spoken in Cameroon * Gabriel Nadeau-Dubois Gabriel Nadeau-Dubois (born May 31, 1990) is a politician from Quebec. With Manon Massé, he is the co-spokesperson of the left-wing party Québec solidaire since May 21, 2017, and was elected as a member of the provincial legislative assembly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Filter
An optical filter is a device that selectively transmits light of different wavelengths, usually implemented as a glass plane or plastic device in the optical path, which are either dyed in the bulk or have interference coatings. The optical properties of filters are completely described by their frequency response, which specifies how the magnitude and phase of each frequency component of an incoming signal is modified by the filter. Filters mostly belong to one of two categories. The simplest, physically, is the absorptive filter; then there are interference or dichroic filters. Many optical filters are used for optical imaging and are manufactured to be transparent; some used for light sources can be translucent. Optical filters selectively transmit light in a particular range of wavelengths, that is, colours, while absorbing the remainder. They can usually pass long wavelengths only (longpass), short wavelengths only (shortpass), or a band of wavelengths, blocking both lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neutral Density Filter
In photography and optics, a neutral-density filter, or ND filter, is a filter that reduces or modifies the intensity of all wavelengths, or colors, of light equally, giving no changes in hue of color rendition. It can be a colorless (clear) or grey filter, and is denoted by Wratten number 96. The purpose of a standard photographic neutral-density filter is to reduce the amount of light entering the lens. Doing so allows the photographer to select combinations of aperture, exposure time and sensor sensitivity that would otherwise produce overexposed pictures. This is done to achieve effects such as a shallower depth of field or motion blur of a subject in a wider range of situations and atmospheric conditions. For example, one might wish to photograph a waterfall at a slow shutter speed to create a deliberate motion-blur effect. The photographer might determine that to obtain the desired effect, a shutter speed of ten seconds was needed. On a very bright day, there might be so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamic Range
Dynamic range (abbreviated DR, DNR, or DYR) is the ratio between the largest and smallest values that a certain quantity can assume. It is often used in the context of signals, like sound and light. It is measured either as a ratio or as a base-10 ( decibel) or base-2 (doublings, bits or stops) logarithmic value of the difference between the smallest and largest signal values. Electronically reproduced audio and video is often processed to fit the original material with a wide dynamic range into a narrower recorded dynamic range that can more easily be stored and reproduced; this processing is called dynamic range compression. Human perception The human senses of sight and hearing have a relatively high dynamic range. However, a human cannot perform these feats of perception at both extremes of the scale at the same time. The human eye takes time to adjust to different light levels, and its dynamic range in a given scene is actually quite limited due to optical glare. The ins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GND Demo-with-fake-GND , a politician in Quebec
{{disambiguation ...
GND may refer to: * Graduated neutral density filter * Green New Deal * Ground (electricity) * (Integrated Authority File) * Maurice Bishop International Airport in Grenada * Zulgo-Gemzek language, spoken in Cameroon * Gabriel Nadeau-Dubois Gabriel Nadeau-Dubois (born May 31, 1990) is a politician from Quebec. With Manon Massé, he is the co-spokesperson of the left-wing party Québec solidaire since May 21, 2017, and was elected as a member of the provincial legislative assembly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landscape Photography
Landscape photography shows the spaces within the world, sometimes vast and unending, but other times microscopic. Landscape photographs typically capture the presence of nature but can also focus on man-made features or disturbances of landscapes. Landscape photography is done for a variety of reasons. Perhaps the most common is to recall a personal observation or experience while in the outdoors, especially when traveling. Others pursue it particularly as an outdoor lifestyle, to be involved with nature and the elements, some as an escape from the artificial world.Caputo, Robert"Landscape Photography Tips" ''National Geographic,'' August 2007, (from ''Photography Field Guide: Landscapes and Ultimate Photography Field Guide: Landscapes'')McNeal, Kevin with interviewer Dimitri Vasileiou"In Conversation... Kevin McNeal", ''Landscape Photography Magazine'', 2014 Edition, p.34Ellement, Brad (U.K."Featured Artist: Brad Ellement", ''Landscape Photography Magazine,'' 2014 Edition, p.56Vas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black-and-white
Black-and-white (B&W or B/W) images combine black and white in a continuous spectrum, producing a range of shades of grey. Media The history of various visual media began with black and white, and as technology improved, altered to color. However, there are exceptions to this rule, including black-and-white fine art photography, as well as many film motion pictures and art film(s). Photography Contemporary use Since the late 1960s, few mainstream films have been shot in black-and-white. The reasons are frequently commercial, as it is difficult to sell a film for television broadcasting if the film is not in color. 1961 was the last year in which the majority of Hollywood films were released in black and white. Computing In computing terminology, ''black-and-white'' is sometimes used to refer to a binary image consisting solely of pure black pixels and pure white ones; what would normally be called a black-and-white image, that is, an image containing shades of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Photographic Society
The Royal Photographic Society of Great Britain, commonly known as the Royal Photographic Society (RPS), is one of the world's oldest photographic societies. It was founded in London, England, in 1853 as the Photographic Society of London with the objective of promoting the art and science of photography, and in 1853 received Monarchy of the United Kingdom, royal patronage from Queen Victoria and Albert, Prince Consort, Prince Albert. A change to the society's name to reflect the patronage was, however, not considered expedient at the time. In 1874, it was renamed the Photographic Society of Great Britain, and only from 1894 did it become known as the Royal Photographic Society of Great Britain, a title which it continues to use today. On 25 June 2019, the Duchess of Cambridge, now Catherine, Princess of Wales, became the Society's Patron, taking over from Queen Elizabeth II who had been patron since 1952. A registered Charitable organization, charity since 1962, in July 2004, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galen Rowell
Galen Avery Rowell (August 23, 1940 – August 11, 2002) was a wilderness photographer, adventure photojournalist and mountaineer. Born in Oakland, California, he became a full-time photographer in 1972. Early life and education Rowell was introduced to the wilderness at a very young age and completed his first roped climb in Yosemite Valley when he was 16. For the rest of his life, he climbed mountains and explored landscapes. He began taking pictures on excursions into the wild so he could share his experiences with friends and family. After graduating from Berkeley High School in 1958, he stayed in Berkeley to study at the University of California but dropped out to pursue climbing. Career In 1972 Rowell sold his small automotive business and became a full-time photographer. Within a year, he had completed his first major assignment, a cover story for ''National Geographic''. The story originated from an invitation by fellow photographer Dewitt Jones to help him on an assign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Darkroom
{{More citations needed, date=May 2008 Digital "darkroom" is the hardware, software and techniques used in digital photography that replace the darkroom equivalents, such as enlarging, cropping, dodging and burning, as well as processes that don't have a film equivalent. All photographs benefit from being developed. With film this could be done at the print lab, or an inexpensive home darkroom. With digital, many cameras are set up to do basic photo enhancement (contrast, color saturation) immediately after a picture is exposed, and to deliver a finished product. Higher end cameras, however, tend to give a flatter, more neutral image that has more data but less "pop," and needs to be developed in the digital darkroom. Setting up a film darkroom was primarily an issue of gathering the right chemicals and lighting; a digital darkroom consists of a powerful computer, a high-quality monitor setup (dual-head, dual monitors are often used) and software. A printer is optional; many photog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clipping (photography)
In digital photography and digital video, clipping is a result of capturing or processing an image where the intensity in a certain area falls outside the minimum and maximum intensity which can be represented. It is an instance of signal clipping in the image domain. The clipped area of the image will typically appear as a uniform area of the minimum or maximum brightness, losing any image detail. The amount by which values were clipped, and the extent of the clipped area, affect the degree to which the clipping is visually noticeable or undesirable in the resulting image. In a color image, clipping may occur in any of the image's color channels separately, which negatively affects colour reproduction. Clipping can occur at many different stages. It may occur in the image sensor when initially capturing the image using a digital camera or scanner. It may occur due to internal image processing or color space conversion in the camera or scanner. It may also result fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
