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Mamiya C330
The Mamiya C330 Professional is a traditional film twin-lens reflex camera introduced in the 1970s for the professional and advanced amateur photography markets. This model was 340 grams lighter than the previous model C33, which weighed 2040 grams (with 80 mm lens). The later C330f is an improvement on the C330 and was succeeded by the C330S with further improvements. * Uses 120 and 220 rollfilms * With the rack and pinion bellows type focusing system, close-up photography is possible without attachments. * Has a self-cocking one action 360° winding crank with a double exposure prevention device. Double exposure is also possible. The straight filmroll path has no right-angle turn and guarantees an absolutely flat film. * The backplate is changeable for single-exposure photography * Dimensions: 122 (w) × 168 (h) × 114 (d) * Weight: 1.7 kg (with standard lens) The Mamiya C-series cameras are one of the very few twin-lens reflex cameras with ''interchangeable lenses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C330with Grip
C33 or C-33 may refer to: Vehicles ;Aircraft * Beechcraft C33 Debonair, an American civil utility aircraft * Boeing C-33, a proposed American military transport * Caspar C 33, a German trainer * Caudron C.33, a French passenger biplane * Douglas C-33, an American military transport ;Automobiles * Nissan Laurel C33, a Japanese sedan * Sauber C33, a Swiss Formula One car ;Ships * , a C-class submarine of the Royal Navy Other uses * Autopista C-33, a highway in Catalonia, Spain * C33 road (Namibia) * Caldwell 33, a supernova remnant * Head and neck cancer * King's Gambit Accepted, a chess opening * C.3.3., the pseudonym used by Oscar Wilde to publish his poem "The Ballad of Reading Gaol" {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shutter Speed
In photography, shutter speed or exposure time is the length of time that the film or digital sensor inside the camera is exposed to light (that is, when the camera's shutter is open) when taking a photograph. The amount of light that reaches the film or image sensor is proportional to the exposure time. of a second will let half as much light in as . Introduction The camera's shutter speed, the lens's aperture or f-stop, and the scene's luminance together determine the amount of light that reaches the film or sensor (the exposure). Exposure value (EV) is a quantity that accounts for the shutter speed and the f-number. Once the sensitivity to light of the recording surface (either film or sensor) is set in numbers expressed in " ISOs" (ex: 200 ISO, 400 ISO), the light emitted by the scene photographed can be controlled through aperture and shutter-speed to match the film or sensor sensitivity to light. This will achieve a good exposure when all the details of the sce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mamiya C220
The Mamiya C220 is a lightweight twin-lens reflex camera made in the early 1970s by the Japanese camera manufacturer Mamiya. The camera has interchangeable lenses ranging from 55 mm wide-angle to 250 mm telephoto and accepts 120 and 220 rollfilms. The rack and pinion focusing system with a bellows makes it possible for close-up photography without attachments. The straight film path has no sharp turns for absolute flatness of the film. Variations of the Mamiya TLR line from the Mamiyaflex to the C330S Professional continued the evolution of the TLR camera with the final TLR, the c330S Pro. Changeable lenses on medium format SLR and rangefinder cameras such as the Hasselblad line or Koni-Omega Press were the norm. The Mamiya twin lens reflex cameras are among the very few medium-format TLR cameras with interchangeable lenses. * Dimensions: 118 mm (w) x 167 mm (h) x 113 mm (d) * Weight: 1.44 kg Lenses There are seven Mamiya Sekor lenses: ; 2 wide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheet Film
Sheet film is large format and medium format photographic film supplied on individual sheets of acetate or polyester film base rather than rolls. Sheet film was initially supplied as an alternative to glass plates. The most popular size measures ; smaller and larger sizes including the gigantic have been made and many are still available today. Using sheet film To use sheet film, the photographer places a sheet of film, emulsion side out, into a film holder in the dark, and closes the dark slide over the loaded film. Next, the holder is inserted into a large-format camera, and the dark slide is removed from the holder. The exposure is made, the dark slide is replaced, and the film holder is removed from the camera. Notches Sheet films have notches cut into one short side. This makes it simple to determine which side is the emulsion, when the film is hidden from sight (in the darkroom, or inside a changing bag). When holding the sheet in "portrait" orientation (shor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photoresistor
A photoresistor (also known as a photocell, or light-dependent resistor, LDR, or photo-conductive cell) is a passive component that decreases resistance with respect to receiving luminosity (light) on the component's sensitive surface. The resistance of a photoresistor decreases with increase in incident light intensity; in other words, it exhibits photoconductivity. A photoresistor can be applied in light-sensitive detector circuits and light-activated and dark-activated switching circuits acting as a resistance semiconductor. In the dark, a photoresistor can have a resistance as high as several megaohms (MΩ), while in the light, a photoresistor can have a resistance as low as a few hundred ohms. If incident light on a photoresistor exceeds a certain frequency, photons absorbed by the semiconductor give bound electrons enough energy to jump into the conduction band. The resulting free electrons (and their hole partners) conduct electricity, thereby lowering resistance. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadmium Sulfide
Cadmium sulfide is the inorganic compound with the formula CdS. Cadmium sulfide is a yellow solid.Egon Wiberg, Arnold Frederick Holleman (2001''Inorganic Chemistry'' Elsevier It occurs in nature with two different crystal structures as the rare minerals greenockite and hawleyite, but is more prevalent as an impurity substituent in the similarly structured zinc ores sphalerite and wurtzite, which are the major economic sources of cadmium. As a compound that is easy to isolate and purify, it is the principal source of cadmium for all commercial applications. Its vivid yellow color led to its adoption as a pigment for the yellow paint "cadmium yellow" in the 18th century. Production Cadmium sulfide can be prepared by the precipitation from soluble cadmium(II) salts with sulfide ion. This reaction has been used for gravimetric analysis and qualitative inorganic analysis.The preparative route and the subsequent treatment of the product, affects the polymorphic form that is produced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porro Prism
In optics, a Porro prism, named for its inventor Ignazio Porro, is a type of ''reflection prism'' used in optical instruments to alter the orientation of an image. Description It consists of a block of material shaped like a right geometric prism with right-angled triangular end faces. In operation, light enters the large rectangular face of the prism, undergoes total internal reflection twice from the sloped faces, and exits again through the large rectangular face. When the light enters and therefore exits the glass at normal incidence, the prism is not dispersive. An image travelling through a Porro prism is rotated by 180° and exits in the opposite direction offset from its entry point. While a single Porro prism can be constructed to work as well as a roof prism, it is seldom used as such. Therefore, to reduce the cost of production for a Porro prism, the edge of the roof is usually left out. Sometimes only one small window as an entrance surface and one window as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Checkerboard
A checkerboard (American English) or chequerboard (British English; see spelling differences) is a board of checkered pattern on which checkers (also known as English draughts) is played. Most commonly, it consists of 64 squares (8×8) of alternating dark and light color, typically green and buff (official tournaments), black and red (consumer commercial), or black and white (printed diagrams). An 8×8 checkerboard is used to play many other games, including chess, whereby it is known as a chessboard. Other rectangular square-tiled boards are also often called checkerboards. Games and puzzles using checkerboards Martin Gardner featured puzzles based on checkerboards in his November 1962 Mathematical Games column in Scientific American. A square checkerboard with an alternating pattern is used for games including: * Amazons * Chapayev * Chess and some of its variants (see chessboard) * Czech draughts * Draughts, also known as checkers * Fox games * Frisian draughts * G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C330CdsPorrofinder "
{{Letter-NumberCombDisambig ...
C33 or C-33 may refer to: Vehicles ;Aircraft * Beechcraft C33 Debonair, an American civil utility aircraft * Boeing C-33, a proposed American military transport * Caspar C 33, a German trainer * Caudron C.33, a French passenger biplane * Douglas C-33, an American military transport ;Automobiles * Nissan Laurel C33, a Japanese sedan * Sauber C33, a Swiss Formula One car ;Ships * , a C-class submarine of the Royal Navy Other uses * Autopista C-33, a highway in Catalonia, Spain * C33 road (Namibia) * Caldwell 33, a supernova remnant * Head and neck cancer * King's Gambit Accepted, a chess opening * C.3.3., the pseudonym used by Oscar Wilde to publish his poem "The Ballad of Reading Gaol ''The Ballad of Reading Gaol'' is a poem by Oscar Wilde, written in exile in Berneval-le-Grand, after his release from Reading Gaol () on 19 May 1897. Wilde had been incarcerated in Reading after being convicted of gross indecency with other m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parallax
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between those two lines. Due to foreshortening, nearby objects show a larger parallax than farther objects when observed from different positions, so parallax can be used to determine distances. To measure large distances, such as the distance of a planet or a star from Earth, astronomers use the principle of parallax. Here, the term ''parallax'' is the semi-angle of inclination between two sight-lines to the star, as observed when Earth is on opposite sides of the Sun in its orbit. These distances form the lowest rung of what is called "the cosmic distance ladder", the first in a succession of methods by which astronomers determine the distances to celestial objects, serving as a basis for other distance measurements in astronomy forming the higher rungs of the ladder. Parallax also affects optic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shutter (photography)
In photography, a shutter is a device that allows light to pass for a determined period, exposing photographic film or a photosensitive digital sensor to light in order to capture a permanent image of a scene. A shutter can also be used to allow pulses of light to pass outwards, as seen in a movie projector or a signal lamp. A shutter of variable speed is used to control exposure time of the film. The shutter is constructed so that it automatically closes after a certain required time interval. The speed of the shutter is controlled by a ring outside the camera, on which various timings are marked. Camera shutter Camera shutters can be fitted in several positions: * Leaf shutters are usually fitted within a lens assembly (''central shutter''), or more rarely immediately behind (''behind-the-lens shutter'') or, even more rarely, in front of a lens, and shut off the beam of light where it is narrow. * Focal-plane shutters are mounted near the focal plane and move to uncover the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Twin-lens Reflex Camera
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 photographic objective or "taking lens" (the lens that takes the picture), while the other is used for the viewfinder system, which is usually viewed from above at waist level. In addition to the objective, the viewfinder consists of a 45-degree mirror (the reason for the word ''reflex'' in the name), a matte focusing screen at the top of the camera, and a pop-up hood surrounding it. The two objectives are connected, so that the focus shown on the focusing screen will be exactly the same as on the film. However, many inexpensive 'pseudo' TLRs are fixed-focus models. Most TLRs use leaf shutters with shutter speeds up to 1/500 of a second with a bulb setting. For practical purposes, all TLRs are film cameras, most often using 120 film, although there are many examples which used 620 film, 127 film, and 35 mm film. Few general-purpose digital TLR ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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