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Director's Viewfinder
A director's viewfinder or director's finder is a viewfinder used by film directors and cinematographers to set the framing of a motion picture or movie camera. There are three types of director's viewfinders. Traditional The most traditional director's viewfinder looks like a short telescope, can be held easily in one hand and is often seen hanging from a lanyard on the director's neck. Sometimes called a "Tewe" in Europe (after a German company that manufactured them). The functionality of these devices is limited in that they only assist in observing the field of view of the lenses that will be used on the motion picture camera but not the characteristics of that lens. This type of viewfinder allows the user to select multiple camera formats, aspect ratios and focal lengths within a specific range. Early blimped motion picture film cameras like the Mitchell Camera BNCR were not reflex finder cameras. Instead a viewfinder similar in concept to the Alan Gordon Mark Vb bolt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viewfinder
In photography, a viewfinder is what the photographer looks through to compose, and, in many cases, to focus the picture. Most viewfinders are separate, and suffer parallax, while the single-lens reflex camera lets the viewfinder use the main optical system. Viewfinders are used in many cameras of different types: still and movie, film, analog and digital. A zoom camera usually zooms its finder in sync with its lens, one exception being rangefinder cameras. History Before the development of microelectronics and electronic display devices, only optical viewfinders existed. Direct optical viewfinders Direct viewfinders are essentially miniature Galilean telescopes; the viewer's eye was placed at the back, and the scene viewed through the viewfinder optics. A declining minority of point and shoot cameras use them. Parallax error results from the viewfinder being offset from the lens axis, to point above and usually to one side of the lens. The error varies with distance, being ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depth Of Field
The depth of field (DOF) is the distance between the nearest and the furthest objects that are in acceptably sharp focus in an image captured with a camera. Factors affecting depth of field For cameras that can only focus on one object distance at a time, depth of field is the distance between the nearest and the farthest objects that are in acceptably sharp focus. "Acceptably sharp focus" is defined using a property called the "circle of confusion". The depth of field can be determined by focal length, distance to subject, the acceptable circle of confusion size, and aperture. Limitations of depth of field can sometimes be overcome with various techniques and equipment. The approximate depth of field can be given by: : \text \approx \frac for a given circle of confusion (c), focal length (f), f-number (N), and distance to subject (u). As distance or the size of the acceptable circle of confusion increases, the depth of field increases; however, increasing the size of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Android (operating System)
Android is a mobile operating system based on a modified version of the Linux kernel and other open-source software, designed primarily for touchscreen mobile devices such as smartphones and tablets. Android is developed by a consortium of developers known as the Open Handset Alliance and commercially sponsored by Google. It was unveiled in November 2007, with the first commercial Android device, the HTC Dream, being launched in September 2008. Most versions of Android are proprietary. The core components are taken from the Android Open Source Project (AOSP), which is free and open-source software (FOSS) primarily licensed under the Apache License. When Android is installed on devices, the ability to modify the otherwise free and open-source software is usually restricted, either by not providing the corresponding source code or by preventing reinstallation through technical measures, thus rendering the installed version proprietary. Most Android devices ship with additional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IPad
The iPad is a brand of iOS and iPadOS-based tablet computers that are developed by Apple Inc. The iPad was conceived before the related iPhone but the iPhone was developed and released first. Speculation about the development, operating system, and release of the original iPad began in 2002 prior to its introduction on January 20, 2010. The iPad range consists of the original iPad lineup and the flagship products iPad Mini, iPad Air, and iPad Pro. The iPhone's iOS operating system (OS) was initially used for the iPad but in September 2019, its OS was switched to a fork of iOS called iPadOS that has better support for the device's hardware and its user interface is customized for the tablets' larger screens. The iPad's App Store is subject to application and content approval. Many older devices are susceptible to jailbreaking, which circumvents these restrictions. The original iPad was well-received for its software and was recognized as one of the most-influential inven ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Video Assist
Video assist is a system used in filmmaking which allows filmmakers to view and distribute a video version of a take immediately after it is filmed. Usage Originally developed to show the camera's view to more people than the one looking through the eyepiece, today video assist is the name of a complex system, consisting of monitors, recorders, video transmitters, video switchers, IT and RF equipment, and hundreds of yards of cables. The video assist crew—the video assist operator, assistant operator, cable guy and video trainee—are in charge of moving, plugging in cables, and troubleshoot. The whole system can easily fill a medium-sized truck. Their job is to setup the video village, consisting of the central video cart and accessories, and in the same or separate villages: director's monitors, producer's monitors, and sometimes DP's monitors (however that nowadays usually done by the DIT). Modern video assist is not only about signal reception and distribution, but recording ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BNCR Mount
BNCR is a lens mount developed by Mitchell Camera, Mitchell for use with its reflex 35mm movie film, 35 mm movie cameras (long back-focus; Bausch & Lomb Super Baltars and equivalents). It was an update of the BNC mount (short back-focus; Bausch & Lomb Baltars and equivalents) done to accommodate the reflex viewer in the later cameras. BNC mount lenses cannot be used in reflex Mitchell cameras as their shorter back-focus will hit and damage the reflex viewer, which, in various versions, was a pellicle (partially silvered) mirror or a (100% silvered, first surface) rotating mirror. The initials stand for Blimped Newsreel Camera Reflex, which meant that it is a 35 mm camera originally intended for news reporting but included a blimp housing for sound stage shooting plus a reflex viewer to allow the camera operator to view the action through the lens while filming. The reflex option was only added in 1967, while the blimp option - thereby converting an NC (Newsreel Camera) into a BN ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PV Mount
A PV mount is a lens mount developed by Panavision for use with both 16 mm and 35 mm film and digital movie camera A movie camera (also known as a film camera and cine-camera) is a type of photographic camera that rapidly takes a sequence of photographs, either on an image sensor or onto film stock, in order to produce a moving image to project onto a movie sc ...s of various sensor sizes. It is one of the mounts offered with Panavision cameras and Panavision-designed lenses. Panavision also modifies ("Panavises") its third party camera and lens equipment in the interest of allowing clients to retain their personal preferences regarding equipment. As they are the only company who can offer this, customers wanting to use Panavision lenses on non-Panavision cameras or vice versa must rent this equipment directly through Panavision. The mount itself contains four pronged flanges, one of which contains a locating pin in the center. This pin is normally seated at the bottom of the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arri PL
The Arri Group () is a German manufacturer of motion picture film equipment. Based in Munich, the company was founded in 1917. It produces professional motion picture cameras, lenses, lighting and post-production equipment. Hermann Simon mentioned this company in his book ''Hidden Champions of the 21st Century'' as an example of a " hidden champion". The Arri Alexa camera system was used to film Academy Award winners for Best Cinematography including ''Hugo'', ''Life of Pi'', ''Gravity'', '' Birdman'', '' The Revenant'' and ''1917''. History Early history Arri was founded in Munich, Germany on 12 September 1917 by August Arnold and Robert Richter as Arnold & Richter Cine Technik. The acronym ''Arri'' was derived from the initial two letters of the founders' surnames, ''Ar''nold and ''Ri''chter. In 1924, Arnold and Richter developed their first film camera, the small and portable Kinarri 35. In 1937, Arri introduced the world's first reflex mirror shutter in the Arriflex 35 c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Aberration
In optics, aberration is a property of optical systems, such as lenses, that causes light to be spread out over some region of space rather than focused to a point. Aberrations cause the image formed by a lens to be blurred or distorted, with the nature of the distortion depending on the type of aberration. Aberration can be defined as a departure of the performance of an optical system from the predictions of paraxial optics. In an imaging system, it occurs when light from one point of an object does not converge into (or does not diverge from) a single point after transmission through the system. Aberrations occur because the simple paraxial theory is not a completely accurate model of the effect of an optical system on light, rather than due to flaws in the optical elements. An image-forming optical system with aberration will produce an image which is not sharp. Makers of optical instruments need to correct optical systems to compensate for aberration. Aberration can be anal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reflex Finder
A reflex finder is a viewfinder system with a mirror placed behind a lens. The light passing through the lens is reflected by the mirror to a focusing screen, usually ground glass. The image formed on this ground glass can be observed directly, giving a ''waist-level reflex finder,'' or through a redressing optical device (set of mirrors or prism) for eye-level viewing, giving an ''eye-level reflex finder''. With a reflex finder, you can focus the image on the ground glass and frame your picture at the same time. It is common to find a device on the center of the ground glass to help precise focusing, for example a split-image or a microprism device. Today's reflex cameras usually incorporate autofocusing. Reflex finders are found in: * Single-lens reflex (SLR) cameras, with one lens for both viewing and taking the picture * Twin-lens reflex A twin-lens reflex camera (TLR) is a type of camera with two objective lenses of the same focal length. One of the lenses is the photo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Film Director
A film director controls a film's artistic and dramatic aspects and visualizes the screenplay (or script) while guiding the film crew and actors in the fulfilment of that vision. The director has a key role in choosing the cast members, production design and all the creative aspects of filmmaking. The film director gives direction to the cast and crew and creates an overall vision through which a film eventually becomes realized or noticed. Directors need to be able to mediate differences in creative visions and stay within the budget. There are many pathways to becoming a film director. Some film directors started as screenwriters, cinematographers, producers, film editors or actors. Other film directors have attended a film school. Directors use different approaches. Some outline a general plotline and let the actors improvise dialogue, while others control every aspect and demand that the actors and crew follow instructions precisely. Some directors also write thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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