Field of View Comparator
AbeCine's field of view comparator.
Showing posts with label Lens. Show all posts
Showing posts with label Lens. Show all posts
An Intro to Lenses
Aperture
The aperture is the diameter of the lens opening. The larger the diameter of the aperture, the more light reaches the film or image sensor. The aperture also performs a critical function for focus. As the aperture decreases in size, the background and foreground gain sharpness. This zone of sharpness is called the depth of field.
Aperture is expressed as F-stop and will be indicated on your camera in abbreviations that look like this: F2.8 or f/2.8. The "F" stands for the focal length of your lens, and the number indicates the diameter of the iris opening.
Focal Length
16mm: An ultra wide lens, this bad boy distorts heavily, emphasizing objects in the foreground by making them look a lot larger than the background. Dynamic, but use with caution!
28mm: Standard for documentary and photojournalism to shoot cowboy shots, otherwise known as medium shots.
35mm: Another standard for documentary filming, also tight enough to shoot portraits.
50mm: Standard for cinema/video, it approximates the human eye's typical focal length.
85mm: A popular portrait, or "beauty" lens. Capable of making everyone look lovely!
200mm: The top of the scale for most people, this is a telephoto lens. Their inherent shallow depth of field makes them useful in eliminating unwanted foreground and background objects by simply throwing them out of focus. Great for sports photography!
Source: Vimeo
3D Lens Adapter for ENG
A prototype lens adapter made by South Korean developer Wasol in co-operation with Ikegami and marketed by Korea's K2E can turn any standard 2D professional camera into one capable of capturing 3D.
The 3D Lensys adapter can be fitted to a conventional lens in about 15 minutes and works by means of a field sequencing device rotating in front of two small lenses. It weighs 21kg.
The field sequencer rotates 60 times a second to deliver 30fps of light into each of the lenses in the adapter. The combined 3D signal is output as HD SDI or component.
“3D Lensys allows you to use only one camera and to shoot in the same way as you would with existing cameras,” said Jin Kin, overseas sales and marketing for K2E. “You save time and money by using your existing equipment throughout the production process.”
K2E said the Lensys can be built to order. It was shown at NAB working on an Ikegami shoulder mount body.
Source: TVB Europe
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