PPT-Understanding Depth of Field and Lenses

Photo Terms Focus is not an absolute There is always a zone either side of the focused point that is acceptably sharp The size of this zone will depend on how far away the subject is the focal length and aperture of the lens the size of the final picture and what you regard as acceptable . gpliinfo brPage 3br Vertex Conversion Chart minus plus 387 400 425 400 425 450 425 450 475 450 475 500 475 500 525 500 525 562 512 550 587 537 575 612 562 600 650 575 625 675 600 650 700 625 675 737 650 700 762 662 725 800 687 750 825 712 775 850 725 Showing Depth of Field in Photography. Apertures . and their Picture Types. Shallow Depth of Field: . Focusing Shots (f3-f5). Shallow Depth of Field: . Focusing Shots (f3-f5). Shallow Depth of Field: . Too much light creates an over-bright image with white spots: parts of the image are . Over-Exposed. Too little light creates an under-bright image with black spots: parts of the image are . Under-Exposed. A report on current myopia progression control developments with contact lenses.. introduction. Two leading researchers who are also practitioners in the field of controlling short-sightedness review the evidence available from various clinical studies which have assessed how effective Overnight Vision Correction (OVC) is in slowing down or halting the progression short-sightedness in children. They highlight the positive conclusions reached by the studies and provide their views on the clinical reasons why overnight . III. Chapter 1 (. Forsyth&Ponce. ). Cameras “. Lenses”. Guido . Gerig. CS 6320 S2015. (Acknowledgements:. modified from Marc . Pollefeys. , UNC Chapel Hill. Some materials from Prof. Trevor Darrell, . D. e. p. t. h. of . F. ie. l. d. D. e. p. t. h. of . F. ie. l. d. What is Depth of Field?. The distance both in front of and behind the focus point which . appears. . acceptably. focused.. D. e. p. Module 5. A. perture. is the camera part that controls the amount of light that enters the camera. . Aperture is measured in f/stops. . The size of the aperture will primarily affect how much of the scene is in focus, the . III. Chapter 1 (. Forsyth&Ponce. ). Cameras “. Lenses. ”. Guido . Gerig. CS 6320 . S2013. (slides modified from Marc . Pollefeys. , UNC Chapel Hill). Pinhole size / aperture. Smaller. Larger. Aperture. The aperture is the opening at the rear of the lens that determines how much light travels through the lens and falls on the image sensor. . The size of the aperture’s opening is measured in f-stops. How does the . aperture . affect exposure?. A WIDE/LARGE f/stop is a SMALLER number (f/2) = OPENS the aperture for MORE light. A SMALL f/stop is a LARGER number (f/22) = CLOSES the aperture for LESS light.. By Stacy . whitaker. Types of cameras Available in the Department of Media and Communication. DSLR Cameras (Digital Single Lens Reflex Cameras) - T5i, T7i, Nikon D3000. Mirrorless Interchangeable . Depth of . f. ield: small. Magnification. Uses lenses arranged in series, made of optical material that bends light. All magnification takes place via lenses. Uses . diascopic. illumination (that is, light is transmitted through the specimen). Magnification up to about 1000x.. Christian Schiffer. North Atlantic 2017, Durham. Geopotential stress from lateral pressure gradients in the lithosphere. North Atlantic geopotential stress field since breakup. Christian Schiffer. North Atlantic 2017, Durham. Sphere (SPH): . The term "sphere" is essentially the degree of correction needed to correct your near or farsightedness.. Terminology. Cylinder (CYL): . The number indicates the lens power needed to correct astigmatism in your eyes..