(شرح الجداول من ٧٦ إلى ٧٨) حدود المنظر field of view

(Explanation of tables from 76 to 78)

FIELD OF VIEW

It is obligatory for all those involved in the cinematic work to be aware of the limits of the back view that will appear in the picture when it is displayed on the screen, because the decorator (who prepares the scenes) is interested, for example, in knowing the amount of height and width of the back ground that must be built or must be drawn, and the product or The production manager means a lot about this in terms of studying production costs, and the photographer must know this in advance in order to determine the focal length of the lens to be used and its distance from the rear view, and to think about it if this lens is suitable for achieving the required depth of field, or to determine whether it is Its capabilities allow the implementation of the wishes of the director or screenwriter. The boundaries of the view vary according to the following factors:

(a) The size of the camera: for example, 65 mm, 35 mm, or 16 mm. As a result of the difference in the size of the camera, the size of the camera window also differs.

(b) The focal length of the lens, for example, its focal length is 35mm, 50mm, or 100mm...etc.

(C) The distance between the rear sight and the camera (for example, at a distance of 10 feet or 20 feet).

(d) Aspect Ratio of the final image that will be displayed on the screen, the Projected Image, as its ratio may differ from the aspect ratio of the camera window in the cases in which the filming is carried out for wide screen projection, because in this case lenses may be used.

Especially known as Anamorphic lenses, they compress the image by squeezing a certain amount, and this pressure may be twice (1:2) or one and a half times (1.5:1) or one and a quarter times (1.25:1). Also, the Projector Aperture window aspect ratio may differ from the Camera Aperture window aspect ratio

Examples of how to use parallax bounds tables

Example: What are both the width and height of the background of the Back ground View that will appear in the image if the photography is taking place with a 35 mm machine that has a lens of 50 millimeters in focal length and is 25 feet away from this back view (note that the image area = 0.868 0.631 of an inch) meaning that the camera window is the standard known as the Academy Aperture, meaning that the aspect ratio of the image = 4:3, i.e. 1.33:1

Answer: From Table No. 77 on page 167, we can conclude that the limits of the scene =

(a) View width = 11 feet
(b) The height of the scene = 8 feet
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