- published: 17 May 2016
- views: 733586
DOF may stand for:
In optics, particularly as it relates to film and photography, depth of field (DOF), also called focus range or effective focus range, is the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image. Although a lens can precisely focus at only one distance at a time, the decrease in sharpness is gradual on each side of the focused distance, so that within the DOF, the unsharpness is imperceptible under normal viewing conditions.
In some cases, it may be desirable to have the entire image sharp, and a large DOF is appropriate. In other cases, a small DOF may be more effective, emphasizing the subject while de-emphasizing the foreground and background. In cinematography, a large DOF is often called deep focus, and a small DOF is often called shallow focus.
Precise focus is possible at only one distance; at that distance, a point object will produce a point image. At any other distance, a point object is defocused, and will produce a blur spot shaped like the aperture, which for the purpose of analysis is usually assumed to be circular. When this circular spot is sufficiently small, it is indistinguishable from a point, and appears to be in focus; it is rendered as "acceptably sharp". The diameter of the circle increases with distance from the point of focus; the largest circle that is indistinguishable from a point is known as the acceptable circle of confusion, or informally, simply as the circle of confusion. The acceptable circle of confusion is influenced by visual acuity, viewing conditions, and the amount by which the image is enlarged (Ray 2000, 52–53). The increase of the circle diameter with defocus is gradual, so the limits of depth of field are not hard boundaries between sharp and unsharp.
Actors: Gray Hofmeyr (writer), John Kani (actor), Greg Melvill-Smith (actor), L. Scott Caldwell (actress), Richard Green (producer), Sandra Prinsloo (actress), Paul Slabolepszy (writer), David Lister (director), Cobus Rossouw (actor), André Scholtz (actor), Martin Le Maitre (actor), Edgar Bold (writer), Edgar Bold (producer), Barbara Nielsen (actress), Lizz Meiring (actress),
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This video explains what depth of field is, how it works, and how to control it. While some concepts are simplified a good deal, it should help you get a good understanding of depth of field. I will be doing later videos to further explain some of the more complex concepts in detail.
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Architectural Animation Reel 2012-2014 by Depth of Field Co.,Ltd. www.dof.co.th www.deeartschool.com
Camera and Gear that we can recommend: http://goo.gl/6C9IjP Blog & Website: http://www.fenchel-janisch.com Fenchel & Janisch DSLR Tutorial Series: Shallow depth of field - curse or blessing? In this video training we're going to talk about the shallow depth of field on HDDSLRs. Pros and cons will be discussed in this DSLR tutorial. Facebook: http://www.fb.com/FenchelJanisch Instagram: http://instagram.com/FenchelJanisch Twitter: http://twitter.com/FenchelJanisch Flickr: http://flickr.com/photos/FenchelJanisch Questions: http://www.fenchel-janisch.com/contact ETHIC STATEMENT: Fenchel & Janisch GbR is not affiliated with any of the companies shown or named in this video. © 2011 by Fenchel & Janisch Filmproduktion GbR
Получите два бесплатных занятия: http://free.incubator.academy/3dmax_kurs/?r159263 Заказать визуализацию: http://omegarender.com/ Мой ID вконтакте: http://vk.com/id362767 Показан процесс работы с глубиной резкости в CORONA-RENDER. DOF эффект.
https://www.youtube.com/user/PhotographyGuide Digital Photography: Technical Tips - Layne Kennedy shows you how to use the depth of field button and explains why its such a valuable tool on your camera. An Ultimate PhotoGuide (UPG) original video.
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