Photographic Technologies
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“Digital Single Lens Reflex”
PHOTOGRAPHY GENERIC ELECTIVE SEM-II DSLR stands for “Digital Single Lens Reflex”. In simple language, a DSLR is a digital camera that uses a mirror mechanism to either reflect light from a camera lens to an optical viewfinder (which is an eyepiece on the back of the camera that one looks through to see what they are taking a picture of) or let light fully pass onto the image sensor (which captures the image) by moving the mirror out of the way. Although single lens reflex cameras have been available in various shapes and forms since the 19th century with film as the recording medium, the first commercial digital SLR with an image sensor appeared in 1991. Compared to point-and-shoot and phone cameras, DSLR cameras typically use interchangeable lenses. Take a look at the following image of an SLR cross section (image courtesy of Wikipedia): When you look through a DSLR viewfinder / eyepiece on the back of the camera, whatever you see is passed through the lens attached to the camera, which means that you could be looking at exactly what you are going to capture. Light from the scene you are attempting to capture passes through the lens into a reflex mirror (#2) that sits at a 45 degree angle inside the camera chamber, which then forwards the light vertically to an optical element called a “pentaprism” (#7). The pentaprism then converts the vertical light to horizontal by redirecting the light through two separate mirrors, right into the viewfinder (#8). When you take a picture, the reflex mirror (#2) swings upwards, blocking the vertical pathway and letting the light directly through. -
Digital Holography Using a Laser Pointer and Consumer Digital Camera Report Date: June 22Nd, 2004
Digital Holography using a Laser Pointer and Consumer Digital Camera Report date: June 22nd, 2004 by David Garber, M.E. undergraduate, Johns Hopkins University, [email protected] Available online at http://pegasus.me.jhu.edu/~lefd/shc/LPholo/lphindex.htm Acknowledgements Faculty sponsor: Prof. Joseph Katz, [email protected] Project idea and direction: Dr. Edwin Malkiel, [email protected] Digital holography reconstruction: Jian Sheng, [email protected] Abstract The point of this project was to examine the feasibility of low-cost holography. Can viable holograms be recorded using an ordinary diode laser pointer and a consumer digital camera? How much does it cost? What are the major difficulties? I set up an in-line holographic system and recorded both still images and movies using a $600 Fujifilm Finepix S602Z digital camera and a $10 laser pointer by Lazerpro. Reconstruction of the stills shows clearly that successful holograms can be created with a low-cost optical setup. The movies did not reconstruct, due to compression and very low image resolution. Garber 2 Theoretical Background What is a hologram? The Merriam-Webster dictionary defines a hologram as, “a three-dimensional image reproduced from a pattern of interference produced by a split coherent beam of radiation (as a laser).” Holograms can produce a three-dimensional image, but it is more helpful for our purposes to think of a hologram as a photograph that can be refocused at any depth. So while a photograph taken of two people standing far apart would have one in focus and one blurry, a hologram taken of the same scene could be reconstructed to bring either person into focus. -
Completing a Photography Exhibit Data Tag
Completing a Photography Exhibit Data Tag Current Data Tags are available at: https://unl.box.com/s/1ttnemphrd4szykl5t9xm1ofiezi86js Camera Make & Model: Indicate the brand and model of the camera, such as Google Pixel 2, Nikon Coolpix B500, or Canon EOS Rebel T7. Focus Type: • Fixed Focus means the photographer is not able to adjust the focal point. These cameras tend to have a large depth of field. This might include basic disposable cameras. • Auto Focus means the camera automatically adjusts the optics in the lens to bring the subject into focus. The camera typically selects what to focus on. However, the photographer may also be able to select the focal point using a touch screen for example, but the camera will automatically adjust the lens. This might include digital cameras and mobile device cameras, such as phones and tablets. • Manual Focus allows the photographer to manually adjust and control the lens’ focus by hand, usually by turning the focus ring. Camera Type: Indicate whether the camera is digital or film. (The following Questions are for Unit 2 and 3 exhibitors only.) Did you manually adjust the aperture, shutter speed, or ISO? Indicate whether you adjusted these settings to capture the photo. Note: Regardless of whether or not you adjusted these settings manually, you must still identify the images specific F Stop, Shutter Sped, ISO, and Focal Length settings. “Auto” is not an acceptable answer. Digital cameras automatically record this information for each photo captured. This information, referred to as Metadata, is attached to the image file and goes with it when the image is downloaded to a computer for example. -
Statement by the Association of Hoving Image Archivists (AXIA) To
Statement by the Association of Hoving Image Archivists (AXIA) to the National FTeservation Board, in reference to the Uational Pilm Preservation Act of 1992, submitted by Dr. Jan-Christopher Eorak , h-esident The Association of Moving Image Archivists was founded in November 1991 in New York by representatives of over eighty American and Canadian film and television archives. Previously grouped loosely together in an ad hoc organization, Pilm Archives Advisory Committee/Television Archives Advisory Committee (FAAC/TAAC), it was felt that the field had matured sufficiently to create a national organization to pursue the interests of its constituents. According to the recently drafted by-laws of the Association, AHIA is a non-profit corporation, chartered under the laws of California, to provide a means for cooperation among individuals concerned with the collection, preservation, exhibition and use of moving image materials, whether chemical or electronic. The objectives of the Association are: a.) To provide a regular means of exchanging information, ideas, and assistance in moving image preservation. b.) To take responsible positions on archival matters affecting moving images. c.) To encourage public awareness of and interest in the preservation, and use of film and video as an important educational, historical, and cultural resource. d.) To promote moving image archival activities, especially preservation, through such means as meetings, workshops, publications, and direct assistance. e. To promote professional standards and practices for moving image archival materials. f. To stimulate and facilitate research on archival matters affecting moving images. Given these objectives, the Association applauds the efforts of the National Film Preservation Board, Library of Congress, to hold public hearings on the current state of film prese~ationin 2 the United States, as a necessary step in implementing the National Film Preservation Act of 1992. -
The Positive and Negative Effects of Photography on Wildlife
Gardner-Webb University Digital Commons @ Gardner-Webb University Undergraduate Honors Theses Honors Program 2020 The Positive and Negative Effects of Photography on Wildlife Joy Smith Follow this and additional works at: https://digitalcommons.gardner-webb.edu/undergrad-honors Part of the Photography Commons The Positive and Negative Effects of Photography on Wildlife An Honors Thesis Presented to The University Honors Program Gardner-Webb University 10 April 2020 by Joy Smith Accepted by the Honors Faculty _______________________________ ________________________________________ Dr. Robert Carey, Thesis Advisor Dr. Tom Jones, Associate Dean, Univ. Honors _______________________________ _______________________________________ Prof. Frank Newton, Honors Committee Dr. Christopher Nelson, Honors Committee _______________________________ _______________________________________ Dr. Bob Bass, Honors Committee Dr. Shea Stuart, Honors Committee I. Overview of Wildlife Photography The purpose of this thesis is to research the positive and negative effects photography has on animals. This includes how photographers have helped to raise awareness about endangered species, as well as how people have hurt animals by getting them too used to cameras and encroaching on their space to take photos. Photographers themselves have been a tremendous help towards the fight to protect animals. Many of them have made it their life's mission to capture photos of elusive animals who are on the verge of extinction. These people know how to properly interact with an animal; they leave them alone and stay as hidden as possible while photographing them so as to not cause the animals any distress. However, tourists, amateur photographers, and a small number of professional photographers can be extremely harmful to animals. When photographing animals, their habitats can become disturbed, they can become very frightened and put in harm's way, and can even hurt or kill photographers who make them feel threatened. -
Sample Manuscript Showing Specifications and Style
Information capacity: a measure of potential image quality of a digital camera Frédéric Cao 1, Frédéric Guichard, Hervé Hornung DxO Labs, 3 rue Nationale, 92100 Boulogne Billancourt, FRANCE ABSTRACT The aim of the paper is to define an objective measurement for evaluating the performance of a digital camera. The challenge is to mix different flaws involving geometry (as distortion or lateral chromatic aberrations), light (as luminance and color shading), or statistical phenomena (as noise). We introduce the concept of information capacity that accounts for all the main defects than can be observed in digital images, and that can be due either to the optics or to the sensor. The information capacity describes the potential of the camera to produce good images. In particular, digital processing can correct some flaws (like distortion). Our definition of information takes possible correction into account and the fact that processing can neither retrieve lost information nor create some. This paper extends some of our previous work where the information capacity was only defined for RAW sensors. The concept is extended for cameras with optical defects as distortion, lateral and longitudinal chromatic aberration or lens shading. Keywords: digital photography, image quality evaluation, optical aberration, information capacity, camera performance database 1. INTRODUCTION The evaluation of a digital camera is a key factor for customers, whether they are vendors or final customers. It relies on many different factors as the presence or not of some functionalities, ergonomic, price, or image quality. Each separate criterion is itself quite complex to evaluate, and depends on many different factors. The case of image quality is a good illustration of this topic. -
Photojournalism Photojournalism
Photojournalism For this section, we'll be looking at photojournalism's impact on shaping people's opinions of the news & world events. Photojournalism From Wikipedia, the free encyclopedia Photojournalism is a particular form of journalism (the collecting, editing, and presenting of news material for publication or broadcast) that employs images in order to tell a news story. It is now usually understood to refer only to still images, but in some cases the term also refers to video used in broadcast journalism. Photojournalism is distinguished from other close branches of photography (e.g., documentary photography, social documentary photography, street photography or celebrity photography) by complying with a rigid ethical framework which demands that the work be both honest and impartial whilst telling the story in strictly journalistic terms. Photojournalists create pictures that contribute to the news media, and help communities connect with one other. Photojournalists must be well informed and knowledgeable about events happening right outside their door. They deliver news in a creative format that is not only informative, but also entertaining. Timeliness The images have meaning in the context of a recently published record of events. Objectivity The situation implied by the images is a fair and accurate representation of the events they depict in both content and tone. Narrative The images combine with other news elements to make facts relatable to audiences. Like a writer, a photojournalist is a reporter, but he or she must often make decisions instantly and carry photographic equipment, often while exposed to significant obstacles (e.g., physical danger, weather, crowds, physical access). -
PRODUCT CATALOGUE All Prices Are Inclusive of VAT HOW to ORDER
ISSUE 29 PRODUCT CATALOGUE All prices are inclusive of VAT HOW TO ORDER TELEPHONE - 01789 739200 With your credit card or debit card ready between 8.30am - 5.30pm Monday to Friday. Outside these hours your order will be handled by answerphone. We check our answerphone first thing every weekday morning, so this will not delay your order. WEB Providing the items you order are in stock and the order is received before 2pm, we aim to deliver to you the next WEBSITE: www.theimagingwarehouse.com working day*. Visit our totally secure website for online ordering of the thousands of products we have in stock ready for immedi- FAX - 01789 731569 ate despatch. Check out our latest offers whilst there! Fax your completed order form with your debit or credit card details to this number. Providing the items are in stock and your With over 2,500 products available from stock, a order is faxed before 2pm, we aim to deliver to you the next range of quality used equipment and a team of working day*. technical staff boasting over 75 years of knowl- edge and experience, we are a one-stop shop for all your darkroom needs. Major brands including: POST Ilford, Kodak, Agfa, Fuji, Fotospeed, Rollei, Adox, FREEPOST RSHZ-JGBS-LGKJ (+ standard address) Kentmere, Harman and more. We continue to be Post your completed order form with your cheque, postal order, the world-leading manufacturer of slot-processors and archival debit or credit card details in an envelope using the Freepost washers, offering a full selection of space saving and environ- address. -
Depth of Field PDF Only
Depth of Field for Digital Images Robin D. Myers Better Light, Inc. In the days before digital images, before the advent of roll film, photography was accomplished with photosensitive emulsions spread on glass plates. After processing and drying the glass negative, it was contact printed onto photosensitive paper to produce the final print. The size of the final print was the same size as the negative. During this period some of the foundational work into the science of photography was performed. One of the concepts developed was the circle of confusion. Contact prints are usually small enough that they are normally viewed at a distance of approximately 250 millimeters (about 10 inches). At this distance the human eye can resolve a detail that occupies an angle of about 1 arc minute. The eye cannot see a difference between a blurred circle and a sharp edged circle that just fills this small angle at this viewing distance. The diameter of this circle is called the circle of confusion. Converting the diameter of this circle into a size measurement, we get about 0.1 millimeters. If we assume a standard print size of 8 by 10 inches (about 200 mm by 250 mm) and divide this by the circle of confusion then an 8x10 print would represent about 2000x2500 smallest discernible points. If these points are equated to their equivalence in digital pixels, then the resolution of a 8x10 print would be about 2000x2500 pixels or about 250 pixels per inch (100 pixels per centimeter). The circle of confusion used for 4x5 film has traditionally been that of a contact print viewed at the standard 250 mm viewing distance. -
17. Display and Illumination of Color and B&W Prints
575 The Permanence and Care of Color Photographs Chapter 17 17. Display and Illumination of Color and B&W Prints The Alarming Light-Induced Image Discoloration and Base Cracking of B&W RC Prints on Long-Term Display Those serving the needs of collections being as for how much image fading and staining can be toler- heavily used for exhibition face a serious di- ated. As discussed in Chapter 7, valuable color prints should lemma. On one hand, they are chronicling, aid- be monitored with a densitometer, and visually significant ing and abetting in the systematic destruction changes in color balance, overall density, and minimum of the photographs they are charged to protect density stain levels should not be permitted to take place. by supporting reprehensible exhibition prac- Display of color prints is inherently detrimental to them, tices. On the other hand, they largely owe their but avoiding display runs counter to the reasons most pho- existence to those very exhibition programs. tographs are made and frequently conflicts with the pur- . The current exhibition vogue amounts to poses for which most individuals and museums collect prints. a systematic program of accelerating the deg- radation of our most valued and important pho- The Expendable or Replaceable Color Print tographs. The practice can and must be changed. No doubt there will be many who will claim that If a color print has no lasting value — or if it can be such an assessment is too extreme and that replaced with a new print after the original has deterio- the problem is being exaggerated. -
Lab 11: the Compound Microscope
OPTI 202L - Geometrical and Instrumental Optics Lab 9-1 LAB 9: THE COMPOUND MICROSCOPE The microscope is a widely used optical instrument. In its simplest form, it consists of two lenses Fig. 9.1. An objective forms a real inverted image of an object, which is a finite distance in front of the lens. This image in turn becomes the object for the ocular, or eyepiece. The eyepiece forms the final image which is virtual, and magnified. The overall magnification is the product of the individual magnifications of the objective and the eyepiece. Figure 9.1. Images in a compound microscope. To illustrate the concept, use a 38 mm focal length lens (KPX079) as the objective, and a 50 mm focal length lens (KBX052) as the eyepiece. Set them up on the optical rail and adjust them until you see an inverted and magnified image of an illuminated object. Note the intermediate real image by inserting a piece of paper between the lenses. Q1 ● Can you demonstrate the final image by holding a piece of paper behind the eyepiece? Why or why not? The eyepiece functions as a magnifying glass, or simple magnifier. In effect, your eye looks into the eyepiece, and in turn the eyepiece looks into the optical system--be it a compound microscope, a spotting scope, telescope, or binocular. In all cases, the eyepiece doesn't view an actual object, but rather some intermediate image formed by the "front" part of the optical system. With telescopes, this intermediate image may be real or virtual. With the compound microscope, this intermediate image is real, formed by the objective lens. -
UK Photography Activity Badge
making a start in photography Jessops is proud to support The Scout Association and sponsor the Scout Photographer Badge know your camera! welcome to the Single use cameras SLRs Digital cameras Single use cameras offer an inexpensive and ‘Single lens reflex’ cameras, often called SLRs, Digital cameras come in both compact and SLR exciting world of risk-free way to take great photos. They are built come in two main types - manual and auto-focus. formats. Rather than saving an image to film, complete with a film inside and once this is used SLRs give you greater artistic control as they can digital cameras save images onto memory cards. photography! up, the whole camera is sent for processing. They be combined with a vast range of interchangeable They have tiny sensors which convert an image are perfect for taking to places where you may lenses and accessories (such as lens filters). You electronically into ‘pixels’ (short for picture To successfully complete the Photographer Badge, be worried about losing or damaging expensive can also adjust almost every setting on the camera elements) which are put together to make up the you will need to learn the basic functions of a equipment (Scout camp for example) and you can yourself - aiding your photographic knowledge complete image. camera, how to use accessories, and how to care even get models suitable for underwater use - and the creative possibilities! for your equipment. You will also need to Capturing images this way means that as soon as perfect for taking to the beach! understand composition, exposure and depth of With manual SLRs, the photographer is in complete the picture is taken, you can view it on the LCD field, film types, how to produce prints and control - and responsible for deciding all the screen featured on most digital cameras.