Everyone takes photos and everyone sees photos and more so I would say. But few actually see. That is few see beyond what is depicted. When one is trained to see a photograph beyond what it depicts The most common cameras belong to the small format category and use mm film. These are again distinguished between reflexes that is those that you see through the lens and allow changing lenses and those that have a fixed lens and aiming is done through the wellknown window. The latter have become known as compact due to their limited volume and weight. In the world of photography money usually corresponds to quality. Therefore the more expensive the machine the better it will probably be. But this has not the slightest correspondence with the artistic quality of the photographs and only a relative and small correspondence with their technical quality.
As a rule reflex cameras are more expensive than compact e-commerce photo editing cameras but there are also some of the latter that exceed the former in quality and cost. Lenses The lens that best reflects the vision of the human eye has a viewing angle of approximately degrees it is called normal and in the case of small format cameras it is known as fifty due to its focal length of millimeters. Any lens with a larger angle of view and therefore a shorter focal length is called a wideangle lens and mm are the most common and any lens with a smaller angle of view and a longer focal length is called a telephoto lens and mm are more common . Lenses with a variable focal length and therefore a variable angle of view are called zooms the most common is the which often replaces the normal as the basic choice in cameras. Film Films are divided into positives slides and negatives.
They are also available in black and white and color. Color slides are also distinguished between those set for daylight or flash Daylight and those set for artificial lighting Tungsten. The sensitivity of films is measured in ASA the identical ISO number is written on the box. The higher the ASA number the more sensitive the film is to light. In fact twice the ASA number means twice the sensitivity. A film ASA is four times more sensitive than a ASA film. Sensitive films have larger grain lower contrast lower sharpness and greater tolerance for mismetering. There is one black and white film that can be viewed and printed on color photography machines and that is XP from Ilford. Speeds how long the light will hit the film so they affect the exposure dark or light photo but they also affect the clarity of the image if we want the object to be clear or blurry the machine shakes. Speeds are expressed in fractions of a second.
發表於 2022-10-29 06:02:01
