Quote:
Depth Of field (DOF) is the amount of distance between the nearest and farthest objects that appear in acceptably sharp focus in a photograph. It is heavily used in photography, film and computer graphics as a creative style element, typical examples ranging from portraiture to macro photography.
In photography, DOF is governed by three factors: aperture, lens focal length and shooting distance. Many consumer class cameras, however, do not provide sufficient and independent control of these parameters. Digital cameras, in particular, usually show a large depth of field - i.e. they are more tolerant to defocus effects. While this may be welcome in some instances (e.g. snapshot applications), it is often a serious deficiency in others (e.g. portraiture/macro photography).
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Quote:
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The term "Bokeh", which in Japanese literally means "blurring", has been introduced into the film, photography and computer graphics industries to describe the out-of-focus blur characteristics. It is determined mainly by the shape of the camera lens and can be seen best on out-of-focus highlights which assume the shape of the lens aperture. A lens with few aperture diaphragm blades (say 5) tends to produce pentagonal highlights, whereas a lens with more aperture blades (say 7-8) tends to produce rounder (heptagonal/octagonal) highlights. Ultimately, a higher number of aperture blades will produce more circular highlights.
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Sursa:
http://www.richardrosenman.com/dofpro.htm
Deşi găsite pe site-ul unui produs comercial care „rezolvă” aceste 2 „aspecte” (scuzaţi-mi improvizaţiile verbale, dar ştiu prea puţine ca să le numesc „technical accurate”) ca plugin Photoshop (cheat
), mi se par importante a fi „put together” şi prezente şi pe forumul nostru.
Thanx BullyPie.
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