هل من الأفضل أن يكون لديك كاميرا يتم فيها لف الفيلم على بكرة أو ملف الأخذ

Is it better to have a camera in which the film is wound on a reel or take-up coil, or to have another in which the film extends from the bottom?

Many years ago, it was customary for the films to be wound on and around a coil so that the end of the photosensitive layer was the innermost part, because this method preserves the natural wrapping of the material and prevents its twisting and elongation. After that, some companies specializing in the manufacture of cameras decided that wrapping the film in the opposite way on the take-up coil (i.e. the end of the photosensitive layer is towards the outside, in contrast to the natural wrapping of the film) will make the film more beautifully located in the focal plane, which reduces the risk of the slight unequal sharpness on a large scale. total image area

The best so far, no one has been able to prove or prove which of the two methods is the other, and in the current era, both methods are used in 35 mm reflective and non-reflective cameras.

How can you be sure that the film is moving in the 35mm camera?

Normally you cannot be sure that 35 mm film is moving inside the camera because it does not have a numbered backing sheet. Since the film-release lever also tensions the shutter for the next exposure and advances the image counter, the fact that these parts are working properly does not indicate that the film is passing through the camera on a coil or take-reel. If the film tab is detached from the pickup roller or if the pinwheel holes are torn

The movie will stop moving. This may not be discovered until after the film has been processed, resulting in loss of images and loss of film

A simple check should be carried out, and this process should become part of the process of filling the camera with film, by engaging two groups of gears approaching the gear wheels, making sure that the tongue of the film wraps around the pickup roller. The camera is re-closed from behind and the loose part of the film is stretched into the cassette by turning the rewind button or the crank arm in the direction indicated by the arrow, and when constant resistance is felt to the winding process, it will stop rotating when the film is advanced by the winding lever the rewind button will rotate In the opposite direction, which indicates that the film has been withdrawn from the cassette, and every time a new image is presented to the front, it is ensured that the film moves. However, this does not indicate that the correct amount has been advanced each time. In the event of physical damage to the pinion holes etc., a simple way of checking is to beautify the camera with a piece of unused film and then remove the lens. Then the shutter of the camera is set to position B, then rotated to the first image, the shutter is opened, and with a pencil, felt-tip, or ball-point pen placed through the narrow groove in the camera and attached to the ends of the shutter hole, a rectangle is drawn on the film, and this process is repeated on The entire film can be confirmed by the empty breaks between the image frames when the film is removed. If different colored markers are used, this test can be repeated many times. You must pay attention and be careful not to damage any part of the camera with the pencil.

If the camera lens cannot be shifted after the film is wound on each image frame, the camera is opened from the rear and the film is marked against an easily identifiable part of the camera. Then the cameras are closed from the back and the process is repeated