ماهي الأصناف الرئيسية في آلات التصوير .. كتاب آلات التصوير

Chapter Four - Projectors (or viewfinders) in machines

Photography

What are the main types of cameras?

The section that, regardless of the shape, the main difference between cameras lies in looking at the thing to be photographed (i.e. shooting). There are four known and common types: direct-curtain focus cameras; cameras with separate viewfinders - either frame or optical; Single-lens reflex cameras and dual-lens reflex cameras

What do these capital letters TTL CAF TLR SLR stand for?

All hobbies and professions have their own idiomatic language. This also applies to photography, and capital letters are often used to abbreviate some of the long terms commonly used, and the aforementioned four symbols are among the most common acronyms, so we find that the letters SLA represent an acronym for the phrase Single-lens reflex, meaning the single-lens reflex camera, which is a camera that .

The letters TLR stand for T in which the process of viewing (vision) and focusing is done through the photographic lens. As for the abbreviation of the phrase Twin-lens Reflex, which means the double-lens camera, it is a camera equipped with two compatible lenses, one for vision and focus, and the other for capturing the image. As for the letters CRF, it stands for Coupled Rangetindex, meaning the coupled range finder. It is a camera equipped with an optical means to determine the range and is connected. With the lens to focus. And such cameras are usually non-reflective and are equipped with a separate viewfinder and represent the letters - TTLfhvn Through the Lens, ie. Through the lens, which means either exposure time, focus, or vision meter readings in a reflex camera - knowing that TTL meter readings are also possible in some non-reflex cameras.

What types of separate viewfinders are available? What is it

The simplest form of viewfinder consists of a wire frame, with or without a rear sight. These mathematical collages are characterized by simplicity and durability, as they enable the photographer to see what is happening around and in the image area as well. Fixed or collapsible optical viewfinders are used to form an image of vision through two lenses. The first cameras were usually equipped with viewfinders at waist level, and these projected a very small floating image onto a ground glass reflective curtain. These rectifiers are the first forms of large flashy rectifiers and dual-lens reflex cameras for focusing. Single-lens reflex cameras use the same principle with the addition of an articulating mirror.

What is the bright line viewfinder?

Some live view viewfinders actually show a larger area than what is recorded with the camera, but they contain an internal light frame to define an area
The image, in addition to some marks to determine the correction of parallax error (Fig. 14) These marks are fixed and thus become appropriate only for a certain distance extending from the camera to the object to be photographed, but since the frame shown only rounds up the image area, these marks are accurate and correct to Enough enough for most close-up shots

The more expensive viewfinder cameras include a number of different frames for different lenses, in which the frame can be moved with the focus set to clarify the image and adjust it properly

What is a comparative rangefinder?

A coupled rangefinder is a mechanical/optical device located within the viewfinder and attached to the lens mount for focusing. The principle is manifested by superimposing a pair of images of the subject to be photographed or by combining two halves split by rotating the lens holder to focus. These two are matched when the lens is focused on
The subject is directed towards it. ) Sometimes non-coupling range finders are used, and these rangefinders simply measure the distance with the same principle of congruence and then. Convert the distance to the lens). Non-coupled rangefinders take a few more minutes to use and may cause a valuable image to be lost. this delay.

What is the court camera?

A camera with a 35 mm live viewfinder is often called a compact camera. This type of camera is lighter and smaller than even the last batch of compact SLR cameras. Many of these 35mm cameras are very complex with some specifications that may include fully automatic exposure time control, built in flash, auto focus or even interchangeable lenses, the main limitation of these cameras being the presence of a viewfinder via Direct vision This can only zoom in the image area in the viewfinder. For all pictures taken of objects more than six feet from the camera, this doesn't really make any difference, but if the distance is closer than that, the parallax error has to be taken into account. This means that we raise the camera slightly to make the lens become in line with the scene of the image formed in the image. If the viewfinder is located on one side of the axis of the lens, then tolerances must also be taken into account for this case.

A camera with a good rangefinder is an exemplary lightweight camera for the photographer who prefers to use just one lens. Better cameras give excellent picture quality