The History of Photography Through the Collection at Pennypacker Mills
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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. -
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. -
Session Outline: History of the Daguerreotype
Fundamentals of the Conservation of Photographs SESSION: History of the Daguerreotype INSTRUCTOR: Grant B. Romer SESSION OUTLINE ABSTRACT The daguerreotype process evolved out of the collaboration of Louis Jacques Mande Daguerre (1787- 1851) and Nicephore Niepce, which began in 1827. During their experiments to invent a commercially viable system of photography a number of photographic processes were evolved which contributed elements that led to the daguerreotype. Following Niepce’s death in 1833, Daguerre continued experimentation and discovered in 1835 the basic principle of the process. Later, investigation of the process by prominent scientists led to important understandings and improvements. By 1843 the process had reached technical perfection and remained the commercially dominant system of photography in the world until the mid-1850’s. The image quality of the fine daguerreotype set the photographic standard and the photographic industry was established around it. The standardized daguerreotype process after 1843 entailed seven essential steps: plate polishing, sensitization, camera exposure, development, fixation, gilding, and drying. The daguerreotype process is explored more fully in the Technical Note: Daguerreotype. The daguerreotype image is seen as a positive to full effect through a combination of the reflection the plate surface and the scattering of light by the imaging particles. Housings exist in great variety of style, usually following the fashion of miniature portrait presentation. The daguerreotype plate is extremely vulnerable to mechanical damage and the deteriorating influences of atmospheric pollutants. Hence, highly colored and obscuring corrosion films are commonly found on daguerreotypes. Many daguerreotypes have been damaged or destroyed by uninformed attempts to wipe these films away. -
Digital Camera Functions All Photography Is Based on the Same
Digital Camera Functions All photography is based on the same optical principle of viewing objects with our eyes. In both cases, light is reflected off of an object and passes through a lens, which focuses the light rays, onto the light sensitive retina, in the case of eyesight, or onto film or an image sensor the case of traditional or digital photography. The shutter is a curtain that is placed between the lens and the camera that briefly opens to let light hit the film in conventional photography or the image sensor in digital photography. The shutter speed refers to how long the curtain stays open to let light in. The higher the number, the shorter the time, and consequently, the less light gets in. So, a shutter speed of 1/60th of a second lets in half the amount of light than a speed of 1/30th of a second. For most normal pictures, shutter speeds range from 1/30th of a second to 1/100th of a second. A faster shutter speed, such as 1/500th of a second or 1/1000th of a second, would be used to take a picture of a fast moving object such as a race car; while a slow shutter speed would be used to take pictures in low-light situations, such as when taking pictures of the moon at night. Remember that the longer the shutter stays open, the more chance the image will be blurred because a person cannot usually hold a camera still for very long. A tripod or other support mechanism should almost always be used to stabilize the camera when slow shutter speeds are used. -
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. -
Photography and Portraiture in Nineteenth-Century China Regine Thiriez
, East Asian History NUMBERS 17/18· JUNE/DECEMBER 1999 Institute of Advanced Studies Australian National University 1 Editor Geremie R. Barme Assistant Editor Helen Lo Editorial Board Mark Elvin (Convenor) John Clark Andrew Fraser Helen Hardacre Colin Jeffcott W.]. F. Jenner Lo Hui-min Gavan McCormack David Marr Tessa Morris-Suzuki Michael Underdown Design and Production Helen Lo Business Manager Marion Weeks Printed by Goanna Print, Fyshwick, ACT This double issue of East Asian History, 17/18, was printed in FebrualY 2000. Contributions to The Editor, East Asian History Division of Pacific and Asian History Research School of Pacific and Asian Studies Australian National University Canberra ACT 0200, Australia Phone +61 26249 3140 Fax +61 26249 5525 email [email protected] Subscription Enquiries to Subscriptions, East Asian History, at the above address Annual Subscription Australia A$45 Overseas US$45 (for two issues) iii CONTENTS 1 Whose Strange Stories? P'u Sung-ling (1640-1715), Herbert Giles (1845- 1935), and the Liao-chai chih-yi John Minfo rd and Tong Man 49 Nihonbashi: Edo's Contested Center Marcia Yonemoto 71 Was Toregene Qatun Ogodei's "Sixth Empress"? 1. de Rachewiltz 77 Photography and Portraiture in Nineteenth-Century China Regine Thiriez 103 Sapajou Richard Rigby 131 Overcoming Risk: a Chinese Mining Company during the Nanjing Decade Tim Wright 169 Garden and Museum: Shadows of Memory at Peking University Vera Schwarcz iv Cover calligraphy Yan Zhenqing M.c�J�n, Tang calligrapher and statesman Cover illustration Talisman-"Passport fo r wandering souls on the way to Hades," from Henri Dore, Researches into Chinese superstitions (Shanghai: T'usewei Printing Press, 1914-38) PHOTOGRAPHY AND PORTRAITURE IN NINETEENTH-CENTURY CHINA � Regine Thiriez A major source of frustration for the amateur of early photographs, especially 1 My thanks go to the many colleagues who portraits, is anonymity. -
Cyanotype Detailed Instructions
Cyanotype Detailed Instructions Cyanotype Formula, Mixing and Exposing Instructions 1. Dissolve 40 g (approximately 2 tablespoons) Potassium Ferricyanide in 400 ml (1.7 cups) water to create STOCK SOLUTION A. Allow 24 hours for the powder to fully dissolve. 2. Dissolve 100 g (approximately .5 cup) Ferric Ammonium Citrate in 400 ml (1.7 cups) water to create if you have Chemistry Open Stock START HERE STOCK SOLUTION B. Allow 24 hours for the powder to fully dissolve. If using the Cyanotype Sensitizer Set, simply fill each bottle with water, shake and allow 24 hours for the powders to dissolve. 3. In subdued lighting, mix equal parts SOLUTION A and SOLUTION B to create the cyanotype sensitizer. Mix only the amount you immediately need, as the sensitizer is stable just 2-4 hours. if you have the Sensitizer Set START HERE 4. Coat paper or fabric with the sensitizer and allow to air dry in the dark. Paper may be double-coated for denser prints. Fabric may be coated or dipped in the sensitizer. Jacquard’s Cyanotype Fabric Sheets and Mural Fabrics are pre-treated with the sensitizer (as above) and come ready to expose. 5. Make exposures in sunlight (1-30 minutes, depending on conditions) or under a UV light source, placing ob- jects or a film negative on the coated surface to create an image. (Note: Over-exposure is almost always preferred to under-exposure.) The fabric will look bronze in color once fully exposed. 6. Process prints in a tray or bucket of cool water. Wash for at least 5 minutes, changing the water periodically, if you have until the water runs clear. -
Dating Photographs Presentation 2007
DDaatitinngg PPhhoottogogrraaphsphs FFiinnddiinngg FFaammiillyy HHiissttoorryy CClluueess tthhrrouougghh OOlldd PPiiccttuurreses l The earliest known photograph taken in North America was taken in October or November 1839. HHisisttorioriccaall TTiimeme LLiinene l NNoo pphhoottooss pprriioorr ttoo 18391839 l DDaagguueerrrreeoottyyppee 11839839 --18601860 l AmAmbbrroottyyppee 18541854 –– 18601860 l TTiinn TTyyppee 18551855 --19301930’’ss l CCararttee ddee VViissttaass 18591859 --18901890’’ss l CCaabbiinneett CCararddss 18661866 –– 19201920’’ss DaDagguueerrrreeoottyyppeses 18391839--18601860 l The Daguerreotype uses a polished, silver plated sheet of metal, and once seen is easily recognized by its mirror-like surface. l The plate has to be held at the correct angle to the light for the image to be visible. That image is extremely sharp and detailed. l The Daguerreotype fell out of favor after 1860 as less expensive techniques supplanted it. l Usually found in cases — either the leather or paper covered wood-frame case, or black molded plastic l Within that case, the photograph is covered with a brass matte, sometimes encased in a brass “preserver” and placed under glass. l If there is no preserver, the Daguerreotype probably dates from the 1840s. l If the matte and preserver are both plain, then it dates from 1850-55. l If there are incised or pressed patterns and decorations on the matte or preserver, then it was probably produced after 1855. AAmmbbrroottyyppeses 18541854--1860s1860s l TThhee AmAmbbrroottyyppee iiss eesssseenntitiaallllyy aa ggllaassss nneeggaatitivvee wwitithh aa bbllaacckk bbaackckggrroounundd tthhaatt mmaakkeess tthhee iimmaaggee aappppeearar ppoossiititivvee.. l MMoorree ccllaarriittyy tthhaann aa ddaagguueerrrreeoottyyppe.e. l IItt iiss aa ccaasseedd pphhootto.o. l IInvnveenntteedd aabboouutt 11854854,, tthhee foforrmm lloosstt ppooppuullarariittyy iinn tthhee eeararllyy 18601860ss wwhheenn ttiinnttyyppeess aanndd ccarardd mmouounntteedd ppaappeerr pprriinnttss rreeppllaacceedd iitt. -
The Other Side of the Lens-Exhibition Catalogue.Pdf
The Other Side of the Lens: Lewis Carroll and the Art of Photography during the 19th Century is curated by Edward Wakeling, Allan Chapman, Janet McMullin and Cristina Neagu and will be open from 4 July ('Alice's Day') to 30 September 2015. The main purpose of this new exhibition is to show the range and variety of photographs taken by Lewis Carroll (aka Charles Dodgson) from topography to still-life, from portraits of famous Victorians to his own family and wide circle of friends. Carroll spent nearly twenty-five years taking photographs, all using the wet-collodion process, from 1856 to 1880. The main sources of the photographs on display are Christ Church Library, the Metropolitan Museum, New York, National Portrait Gallery, London, Princeton University and the University of Texas at Austin. Visiting hours: Monday: 2:00 pm - 4.30 pm; Tuesday - Thursday: 10.00 am - 1.00 pm; 2:00 pm - 4.30 pm; Friday: 10:00 am - 1.00 pm. Framed photographs on loan from Edward Wakeling Photographic equipment on loan from Allan Chapman Exhibition catalogue and poster by Cristina Neagu 2 The Other Side of the Lens Lewis Carroll and the Art of Photography ‘A Tea Merchant’, 14 July 1873. IN 2155 (Texas). Tom Quad Rooftop Studio, Christ Church. Xie Kitchin dressed in a genuine Chinese costume sitting on tea-chests portraying a Chinese ‘tea merchant’. Dodgson subtitled this as ‘on duty’. In a paired image, she sits with hat off in ‘off duty’ pose. Contents Charles Lutwidge Dodgson and His Camera 5 Exhibition Catalogue Display Cases 17 Framed Photographs 22 Photographic Equipment 26 3 4 Croft Rectory, July 1856. -
19Th Century Photograph Preservation: a Study of Daguerreotype And
UNIVERSITY OF OKLAHOMA PRESERVATION OF INFORMATION MATERIALS LIS 5653 900 19th Century Photograph Preservation A Study of Daguerreotype and Collodion Processes Jill K. Flowers 3/28/2009 19th Century Photograph Preservation A Study of Daguerreotype and Collodion Processes Jill K. Flowers Photography is the process of using light to record images. The human race has recorded the images of experience from the time when painting pictographs on cave walls was the only available medium. Humanity seems driven to transcribe life experiences not only into language but also into images. The birth of photography occurred in the 19th Century. There were at least seven different processes developed during the century. This paper will focus on two of the most prevalent formats. The daguerreotype and the wet plate collodion process were both highly popular and today they have a significant presence in archives, libraries, and museums. Examination of the process of image creation is reviewed as well as the preservation and restoration processes in use today. The daguerreotype was the first successful and practical form of commercial photography. Jacques Mande‟ Daguerre invented the process in a collaborative effort with Nicephore Niepce. Daguerre introduced the imaging process on August 19, 1839 in Paris and it was in popular use from 1839 to approximately 1860. The daguerreotype marks the beginning of the era of photography. Daguerreotypes are unique in the family of photographic process, in that the image is produced on metal directly without an intervening negative. Image support is provided by a copper plate, coated with silver, and then cleaned and highly polished.