Photography Dictionary (AB)

Safety light Safelight
Also known as security lights. The same meaning as darkroom lights. Refers to the interior lighting during the development and enlargement operations. It is necessary to maintain the brightness of the bulb, the distance of the film (paper) to the light, and the exposure time. Otherwise, it may be the cause of gray scale. When used for close contact, it should be bright yellowish red, and it should be yellow-green when enlarged. The full-color film is dark green and the positive film is dark red. However, it is necessary to keep the brightness of the bright spot within the minimum limit, otherwise it will become the cause of gray scale. Normal film development should develop the habit of working in the dark.

Safety light glass Safelihgt glass
Refers to the colored filter used in the darkroom light, which is a sandwich of a gelatin filter and a diffuser plate in a glass slide. Divided into full-color film, silver bromide photo paper, silver chlorobromide photo paper, light photo paper, etc., can be used interchangeably.

Safety Film
Refers to flammable films made with nitrocellulose sheets. In contrast, non-combustible films made of cellulose acylate or polyester base. Usually sold on the market is safety film.

Darkroom Darkroom
Also known as darkroom. For the development of the film, a small developer tank and a change bag are also sufficient, but copying and enlargement require a dark room. In the past, the dark room was painted black, but it is actually white or bright. Although there is a need to adapt to the width of the workload, as long as the arrangement of efforts, there are 3 square meters is enough. In addition to private darkrooms, bathrooms, bedrooms or dens can be used instead of darkrooms at night. There should be drainage and it is convenient to work.

Darkroom lamp
Refers to the safety light illumination tool used for developing film and photographic paper. It is divided into darkroom light bulbs made of safety glass for the light bulbs, and light bulbs with 10 watts mounted above and below, and boxes equipped with safety light filters.

Darkroom clock
It belongs to the alarm clock and is coated with a luminous paint on minute hands, currency notes and scales. Mostly 60 minutes.

Camera Obscura
It is considered to be the prototype of the camera. The inside is dark and has a pinhole in front of the camera and a focusing glass at the back. Since then, instead of the pinhole in front, a convex lens has been used as a camera by Daguerre et al.


B

Swing Pendulum
A photo of a point light that is suspended by a filament and taken from its motion. With the action of vibrating, you can take interesting and complex curves.

Swing lens
Also known as moving lens. The replacement lens for a 35mm single-lens reflex camera is a wide-angle lens equipped with a mechanism capable of rotating up and down or left and right. The focal length is more than 35mm, which is a lens that is convenient for building photography and indoor photography.

Half size Half size
It is 24*18 millimeters, half the size of 35 millimeters. With this size film camera, originally only 36 shots can shoot 72.

Semi-circular lens Dome lens
A hemispherical lens mounted on a deep-water camera seal box. First calculate the curvature with the focal length to determine the installation position. Once this lens is mounted, the field of view of the camera lens mounted in the box will not become narrow due to deep water.

Semi gloss paper Semimatt paper
Also called semi-textured photo paper. Refers to less glossy photo paper.

Semi-backlit Half rear light
Refers to the backlight from the oblique direction facing the camera. There are features that emphasize the three-dimensional aspect of the subject, and Rembrandt's light is approximately semi-backlit.

Halftone Halftone
Regardless of whether it is a positive or negative film, after the screening process before platemaking, from the bright tone to the dark tone, all the dots are used to express the level of halftone.

Half size Half size
Half of the full sheet of paper is 356*432 mm in printed paper.

Report Photography Photography
Also known as news photography. The general designation of photographs published for the purpose of reporting on the pages and gravure inserts of newspapers and magazines. Including people, events, scientific records, documentary photography, and several photographs involving all fields.

Exposure Exposure
Refers to the necessary light to the film or the printing paper, to a certain extent, can be adjusted within the latitude of the latitude. For example, when the color negative film exceeds 4 times of the proper exposure, the printing becomes difficult to carry out, and the color The reversal film exceeds the 1st aperture, and the color runs a lot.

Exposure Unexperience of exposure
In the aperture, shutter, due to uneven exposure and other phenomena.

Exposure meter
The meters that determine the appropriate exposure are now mostly electric exposure meters. When simply referring to the exposure meter, it is mostly referred to as an electric exposure meter.

Exposure
On the photosensitive surface of a photographic light-sensitive material, the time integral of the illuminance.

Exposure value, EV
The aperture value (F value) is used in conjunction with the shutter speed to indicate the amount of exposure.

Underexposure Underexposure
Refers to the lack of light suitable for photography. For example, when a color negative film is 1/3 times or less, the color image may show its difference after exposure to a color photograph, and the color reversal film encounters the deficiency of the first-order aperture, and the color starts to become cloudy and the screen becomes dark.

Exposure density Exposure
Using the concept quoted in the color reproduction theory of color photography, the photographic effect produced by the reflection or transmitted light of a subject projected on a color photosensitive material is calculated by a formula similar to the color density calculation.

Exposure time
In order to project light onto the photosensitive surface of a photographic light-sensitive material, the time the shutter is to be opened. The photosensitivity of the photosensitive material depends on the illumination on the photosensitive surface.


Exposure index Exposure index
In consideration of proper exposure, the number as a target of film sensitivity is represented by the value of AS100, JIS100 when it is actually used.

Exposure to Peacan
In the summer sunny days, it is the meaning of the outdoor sun. Portrait photography should absolutely avoid this condition.

Saturation
A term that represents the degree of color.

Background
Specimen photography, portrait photography, etc., depending on whether they pay attention to the background, will result in completely different views of the photo. In order to clearly capture the object of interest, care should be taken not to exceed the lens aperture, or to distance the subject from the background. For small items such as specimens, black backs are required, and black velvet cloth is relatively simple and effective. Be careful not to use black paper. For white, gray and colored backgrounds, support the subject with a glass plate, etc., and the distance from the background can be opened to more than three times the size of the subject.

Back Light
Backlit lighting. In the case of an astigmatism light source, it becomes a black outline image, and the projection is spotlighted to become a line image. Other lights that illuminate the background in the studio. Called background light.

Subject Object
Refers to the object to be photographed with the camera.

Subject distance from Subject distance
Also known as shooting distance. Refers to the distance from the camera to the subject. Correctly, the distance from the film surface to the subject.

Pen Camera
Refers to a half size 24*18mm compact camera.

Fringe effect
The weakly exposed portion adjacent to the strongly exposed portion is affected by the localized development product from the strongly exposed portion to the portion where the exposure is light, and the effect of suppressing the development is generated, so that the developing effect of density drop occurs close to the interface of the interface.


Zoom ratio Zoom ration
The ratio of the shortest focus to the longest focus of the zoom lens. The 80 to 200 mm lens has a zoom ratio of 2.5. Single-lens reflex cameras use 2 to 2.5 times more, and 8 mm movie cameras use 3 to 8 times more.

Zoom Converter
In the scope of photography, it is the same as the zoom head. A posterior scaler mounted behind the camera.

Zoom lens
It used to be a lens used for zooming in movie photography. Recently, a variety of products for 35mm single-lens reflex cameras have been sold. According to the adjustment of the circle, the focal length can be continuously changed. The zoom ratio is mostly 2 to 2.5 times. Using a zoom lens can top 2-3 replacement lenses, which is very convenient for a simple snapshot. Focusing on the long focal length reduces the chance of false focus. Due to the subtle changes in focal length, amplitude modulation is important when using a zoom lens. There are more zoom lenses with a telescopic perspective of more than 70mm, and there have been more recent zoom lenses for wide-angle lenses.

Discoloration
The main batch of black and white photographs turned brown during the preservation period. Also known as fading. Under conditions of high humidity and high temperatures, discoloration is also rapid. The reason for this is mainly due to insufficient flushing after printing or printing, or insufficient fixing. Bleaching may be remedied by re-developing after bleaching, but a blue filter is attached to the full-color film for remake, and a new photo can also be obtained from the negative film.

Anamorphic lens
Like a wide screen, a special lens used to shoot horizontally long shots to deform the image. Generally speaking, after shooting in the left-right direction, an anamorphic lens for showing on a fashion show is displayed, and a horizontally long screen is obtained.

Nominal sensitivity
The sensitivity marked on the film envelope.

Standard zoom
For short-zoom or telephoto lenses, the lens can be compensated for from the wide-angle end to the far-end. There are 35-70 mm, 43-86 mm points.

Standard lens
The general term for a lens with a viewing angle of about 50 degrees. In other words, the focal length of the lens that is close to the diagonal of the screen, 35 mm is a 40-60 mm focal length lens, 6*6 centimeters is a 75-80 mm focal length lens, 4*5 inches is 120 — 150 mm.

Standard Reflector Gray Scale
Also known as "standard grey board". The reflection coefficient of the surface reaches 18%, referring to the gray matt card board. Most subjects have various reflection coefficients and colors, and their respective average values ​​are considered as 18% of the reflection coefficient. Based on this, a tool for matching the exposure is provided. With the use of a reflective exposure meter and TTL metering, if the standard reflector is used for metering, even if the difference between the subject and the background is large, the metering value will not be greatly deviated, which is convenient. As a substitute for standard reflectors, there are gray vinyl plates and light brown kraft paper.

Standard development
Usually refers to the use of the D-76 formula or Fujirdol, such as the development, or at the standard time, refers to the developer used. Occasionally, for the purpose of measuring the sensitivity of a film, a formulation recognized by Japan Industrial Standards or the American Standards Association is used, referring to its development conditions or the developer used.

Specimen Photography Specimen photography
For biology, geology, etc., it is used for recording specimens. For medical purposes, it is mainly taken with images of enucleated organs. From a photographic point of view, since the close-up of the scope of the zooming in the end, according to the arrangement of lighting and background, dominate the photography effect. As for color photography, in order to create a photographic standard in which the specimen reaches color reproduction, the condition of the general photography is more stringent. In order to make the shape of the specimen clearly visible, it is usually taken in proportion to the picture.

Paste photo paste on panel
Refers to sticking photos on wood framed plywood. In order to display large photos, most of the photos are to be affixed to plywood. The method of affixing black-and-white photos and color photos varies depending on the conditions. Recent affix stickers are considered to be a type of photo from the point of view of production. Post it.

Cloth Lighting
Also known as lighting or lighting. The light source of the photographing system 1 that uses natural light alone is used. When two lamps or more are combined, the main light and the auxiliary light are effectively combined and used, which is called lighting.

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