General Lens Catalog
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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. -
Optics – Panoramic Lens Applications Revisited
Panoramic Lens Applications Revisited Simon Thibault* M.Sc., Ph.D., Eng Director, Optics Division/Principal Optical Designer ImmerVision 2020 University, Montreal, Quebec, H3A 2A5 Canada ABSTRACT During the last few years, innovative optical design strategies to generate and control image mapping have been successful in producing high-resolution digital imagers and projectors. This new generation of panoramic lenses includes catadioptric panoramic lenses, panoramic annular lenses, visible/IR fisheye lenses, anamorphic wide-angle attachments, and visible/IR panomorph lenses. Given that a wide-angle lens images a large field of view on a limited number of pixels, a systematic pixel-to-angle mapping will help the efficient use of each pixel in the field of view. In this paper, we present several modern applications of these modern types of hemispheric lenses. Recently, surveillance and security applications have been proposed and published in Security and Defence symposium. However, modern hemispheric lens can be used in many other fields. A panoramic imaging sensor contributes most to the perception of the world. Panoramic lenses are now ready to be deployed in many optical solutions. Covered applications include, but are not limited to medical imaging (endoscope, rigiscope, fiberscope…), remote sensing (pipe inspection, crime scene investigation, archeology…), multimedia (hemispheric projector, panoramic image…). Modern panoramic technologies allow simple and efficient digital image processing and the use of standard image analysis features (motion estimation, segmentation, object tracking, pattern recognition) in the complete 360o hemispheric area. Keywords: medical imaging, image analysis, immersion, omnidirectional, panoramic, panomorph, multimedia, total situation awareness, remote sensing, wide-angle 1. INTRODUCTION Photography was invented by Daguerre in 1837, and at that time the main photographic objective was that the lens should cover a wide-angle field of view with a relatively high aperture1. -
Panoramas Shoot with the Camera Positioned Vertically As This Will Give the Photo Merging Software More Wriggle-Room in Merging the Images
P a n o r a m a s What is a Panorama? A panoramic photo covers a larger field of view than a “normal” photograph. In general if the aspect ratio is 2 to 1 or greater then it’s classified as a panoramic photo. This sample is about 3 times wider than tall, an aspect ratio of 3 to 1. What is a Panorama? A panorama is not limited to horizontal shots only. Vertical images are also an option. How is a Panorama Made? Panoramic photos are created by taking a series of overlapping photos and merging them together using software. Why Not Just Crop a Photo? • Making a panorama by cropping deletes a lot of data from the image. • That’s not a problem if you are just going to view it in a small format or at a low resolution. • However, if you want to print the image in a large format the loss of data will limit the size and quality that can be made. Get a Really Wide Angle Lens? • A wide-angle lens still may not be wide enough to capture the whole scene in a single shot. Sometime you just can’t get back far enough. • Photos taken with a wide-angle lens can exhibit undesirable lens distortion. • Lens cost, an auto focus 14mm f/2.8 lens can set you back $1,800 plus. What Lens to Use? • A standard lens works very well for taking panoramic photos. • You get minimal lens distortion, resulting in more realistic panoramic photos. • Choose a lens or focal length on a zoom lens of between 35mm and 80mm. -
Chapter 3 (Aberrations)
Chapter 3 Aberrations 3.1 Introduction In Chap. 2 we discussed the image-forming characteristics of optical systems, but we limited our consideration to an infinitesimal thread- like region about the optical axis called the paraxial region. In this chapter we will consider, in general terms, the behavior of lenses with finite apertures and fields of view. It has been pointed out that well- corrected optical systems behave nearly according to the rules of paraxial imagery given in Chap. 2. This is another way of stating that a lens without aberrations forms an image of the size and in the loca- tion given by the equations for the paraxial or first-order region. We shall measure the aberrations by the amount by which rays miss the paraxial image point. It can be seen that aberrations may be determined by calculating the location of the paraxial image of an object point and then tracing a large number of rays (by the exact trigonometrical ray-tracing equa- tions of Chap. 10) to determine the amounts by which the rays depart from the paraxial image point. Stated this baldly, the mathematical determination of the aberrations of a lens which covered any reason- able field at a real aperture would seem a formidable task, involving an almost infinite amount of labor. However, by classifying the various types of image faults and by understanding the behavior of each type, the work of determining the aberrations of a lens system can be sim- plified greatly, since only a few rays need be traced to evaluate each aberration; thus the problem assumes more manageable proportions. -
Determination of Focal Length of a Converging Lens and Mirror
Physics 41- Lab 5 Determination of Focal Length of A Converging Lens and Mirror Objective: Apply the thin-lens equation and the mirror equation to determine the focal length of a converging (biconvex) lens and mirror. Apparatus: Biconvex glass lens, spherical concave mirror, meter ruler, optical bench, lens holder, self-illuminated object (generally a vertical arrow), screen. Background In class you have studied the physics of thin lenses and spherical mirrors. In today's lab, we will analyze several physical configurations using both biconvex lenses and concave mirrors. The components of the experiment, that is, the optics device (lens or mirror), object and image screen, will be placed on a meter stick and may be repositioned easily. The meter stick is used to determine the position of each component. For our object, we will make use of a light source with some distinguishing marking, such as an arrow or visible filament. Light from the object passes through the lens and the resulting image is focused onto a white screen. One characteristic feature of all thin lenses and concave mirrors is the focal length, f, and is defined as the image distance of an object that is positioned infinitely far way. The focal lengths of a biconvex lens and a concave mirror are shown in Figures 1 and 2, respectively. Notice the incoming light rays from the object are parallel, indicating the object is very far away. The point, C, in Figure 2 marks the center of curvature of the mirror. The distance from C to any point on the mirror is known as the radius of curvature, R. -
Seeing Like Your Camera ○ My List of Specific Videos I Recommend for Homework I.E
Accessing Lynda.com ● Free to Mason community ● Set your browser to lynda.gmu.edu ○ Log-in using your Mason ID and Password ● Playlists Seeing Like Your Camera ○ My list of specific videos I recommend for homework i.e. pre- and post-session viewing.. PART 2 - FALL 2016 ○ Clicking on the name of the video segment will bring you immediately to Lynda.com (or the login window) Stan Schretter ○ I recommend that you eventually watch the entire video class, since we will only use small segments of each video class [email protected] 1 2 Ways To Take This Course What Creates a Photograph ● Each class will cover on one or two topics in detail ● Light ○ Lynda.com videos cover a lot more material ○ I will email the video playlist and the my charts before each class ● Camera ● My Scale of Value ○ Maximum Benefit: Review Videos Before Class & Attend Lectures ● Composition & Practice after Each Class ○ Less Benefit: Do not look at the Videos; Attend Lectures and ● Camera Setup Practice after Each Class ○ Some Benefit: Look at Videos; Don’t attend Lectures ● Post Processing 3 4 This Course - “The Shot” This Course - “The Shot” ● Camera Setup ○ Exposure ● Light ■ “Proper” Light on the Sensor ■ Depth of Field ■ Stop or Show the Action ● Camera ○ Focus ○ Getting the Color Right ● Composition ■ White Balance ● Composition ● Camera Setup ○ Key Photographic Element(s) ○ Moving The Eye Through The Frame ■ Negative Space ● Post Processing ○ Perspective ○ Story 5 6 Outline of This Class Class Topics PART 1 - Summer 2016 PART 2 - Fall 2016 ● Topic 1 ○ Review of Part 1 ● Increasing Your Vision ● Brief Review of Part 1 ○ Shutter Speed, Aperture, ISO ○ Shutter Speed ● Seeing The Light ○ Composition ○ Aperture ○ Color, dynamic range, ● Topic 2 ○ ISO and White Balance histograms, backlighting, etc. -
Wilmington Funds Holdings Template DRAFT
Wilmington Global Alpha Equities Fund as of 5/31/2021 (Portfolio composition is subject to change) ISSUER NAME % OF ASSETS USD/CAD FWD 20210616 00050 3.16% DREYFUS GOVT CASH MGMT-I 2.91% MORGAN STANLEY FUTURE USD SECURED - TOTAL EQUITY 2.81% USD/EUR FWD 20210616 00050 1.69% MICROSOFT CORP 1.62% USD/GBP FWD 20210616 49 1.40% USD/JPY FWD 20210616 00050 1.34% APPLE INC 1.25% AMAZON.COM INC 1.20% ALPHABET INC 1.03% CANADIAN NATIONAL RAILWAY CO 0.99% AIA GROUP LTD 0.98% NOVARTIS AG 0.98% TENCENT HOLDINGS LTD 0.91% INTACT FINANCIAL CORP 0.91% CHARLES SCHWAB CORP/THE 0.91% FACEBOOK INC 0.84% FORTIVE CORP 0.81% BRENNTAG SE 0.77% COPART INC 0.75% CONSTELLATION SOFTWARE INC/CANADA 0.70% UNITEDHEALTH GROUP INC 0.70% AXA SA 0.63% FIDELITY NATIONAL INFORMATION SERVICES INC 0.63% BERKSHIRE HATHAWAY INC 0.62% PFIZER INC 0.62% TOTAL SE 0.61% MEDICAL PROPERTIES TRUST INC 0.61% VINCI SA 0.60% COMPASS GROUP PLC 0.60% KDDI CORP 0.60% BAE SYSTEMS PLC 0.57% MOTOROLA SOLUTIONS INC 0.57% NATIONAL GRID PLC 0.56% PUBLIC STORAGE 0.56% NVR INC 0.53% AMERICAN TOWER CORP 0.53% MEDTRONIC PLC 0.51% PROGRESSIVE CORP/THE 0.50% DANAHER CORP 0.50% MARKEL CORP 0.49% JOHNSON & JOHNSON 0.48% BUREAU VERITAS SA 0.48% NESTLE SA 0.47% MARSH & MCLENNAN COS INC 0.46% ALIBABA GROUP HOLDING LTD 0.45% LOCKHEED MARTIN CORP 0.45% ALPHABET INC 0.44% MERCK & CO INC 0.43% CINTAS CORP 0.42% EXPEDITORS INTERNATIONAL OF WASHINGTON INC 0.41% MCDONALD'S CORP 0.41% RIO TINTO PLC 0.41% IDEX CORP 0.40% DIAGEO PLC 0.40% LENNOX INTERNATIONAL INC 0.40% PNC FINANCIAL SERVICES GROUP INC/THE 0.40% ACCENTURE -
A Simple and Efficient Image Stabilization Method for Coastal Monitoring Video Systems
remote sensing Article A Simple and Efficient Image Stabilization Method for Coastal Monitoring Video Systems Isaac Rodriguez-Padilla 1,* , Bruno Castelle 1 , Vincent Marieu 1 and Denis Morichon 2 1 CNRS, UMR 5805 EPOC, Université de Bordeaux, 33615 Pessac, France; [email protected] (B.C.); [email protected] (V.M.) 2 SIAME-E2S, Université de Pau et des Pays de l’Adour, 64600 Anglet, France; [email protected] * Correspondence: [email protected] Received: 21 November 2019; Accepted: 21 December 2019; Published: 24 December 2019 Abstract: Fixed video camera systems are consistently prone to importune motions over time due to either thermal effects or mechanical factors. Even subtle displacements are mostly overlooked or ignored, although they can lead to large geo-rectification errors. This paper describes a simple and efficient method to stabilize an either continuous or sub-sampled image sequence based on feature matching and sub-pixel cross-correlation techniques. The method requires the presence and identification of different land-sub-image regions containing static recognizable features, such as corners or salient points, referred to as keypoints. A Canny edge detector (CED) is used to locate and extract the boundaries of the features. Keypoints are matched against themselves after computing their two-dimensional displacement with respect to a reference frame. Pairs of keypoints are subsequently used as control points to fit a geometric transformation in order to align the whole frame with the reference image. The stabilization method is applied to five years of daily images collected from a three-camera permanent video system located at Anglet Beach in southwestern France. -
How Does the Light Adjustable Lens Work? What Should I Expect in The
How does the Light Adjustable Lens work? The unique feature of the Light Adjustable Lens is that the shape and focusing characteristics can be changed after implantation in the eye using an office-based UV light source called a Light Delivery Device or LDD. The Light Adjustable Lens itself has special particles (called macromers), which are distributed throughout the lens. When ultraviolet (UV) light from the LDD is directed to a specific area of the lens, the particles in the path of the light connect with other particles (forming polymers). The remaining unconnected particles then move to the exposed area. This movement causes a highly predictable change in the curvature of the lens. The new shape of the lens will match the prescription you selected during your eye exam. What should I expect in the period after cataract surgery? Please follow all instructions provided to you by your eye doctor and staff, including wearing of the UV-blocking glasses that will be provided to you. As with any cataract surgery, your vision may not be perfect after surgery. While your eye doctor selected the lens he or she anticipated would give you the best possible vision, it was only an estimate. Fortunately, you have selected the Light Adjustable Lens! In the next weeks, you and your eye doctor will work together to optimize your vision. Please make sure to pay close attention to your vision and be prepared to discuss preferences with your eye doctor. Why do I have to wear UV-blocking glasses? The UV-blocking glasses you are provided with protect the Light Adjustable Lens from UV light sources other than the LDD that your doctor will use to optimize your vision. -
AF-S TELECONVERTER TC-14E III 引火・爆発のおそれのある場所では使わない Nifi Cation by 1.4 ×
A 警告 English ■ Supplied Accessories Fixation du téléconvertisseur • AF-S VR Micro-Nikkor 105 mm f/2.8G IF-ED (no es compatible con autofoco)* • Não olhe para o sol através da lente ou do visor da câmera. A observação do 繁體中文 • Teleconverter Cap BF-3B • Soft Case CL-0715 Placez-vous à l’abri du soleil et mettez l’appareil photo hors tension. Alignez • AF-S VR Nikkor ED 200 mm F2G (IF) sol ou de outra fonte de luz intensa através da lente, do visor ou do 水につけたり、水をかけたり、雨にぬらさない J Thank you for your purchase of a Nikon teleconverter. Mounted between • Rear Lens Cap LF-4 le repère de montage du téléconvertisseur (e) sur le repère de montage • AF-S NIKKOR 200 mm f/2G ED VR II teleconversor pode causar incapacidade visual permanente. 感謝您購買尼康增距鏡。該鏡頭附件安裝於鏡頭和相機機身之間後, 水かけ禁止 感電や発火などの事故や故障の原因になります。 the lens and the camera body, this lens attachment increases lens mag- de l’objectif, situé sur l’appareil photo, puis posez le téléconvertisseur sur • AF-S VR Nikkor ED 300 mm F2.8G (IF) • Mantenha longe do alcance das crianças. A não observância desta precaução 可將鏡頭放大倍率增加至 1.4 倍。 在 使 用 本 產 品 前, 請 仔 細 閱 讀 這 些指南以及相機和鏡頭的說明書。 AF-S TELECONVERTER TC-14E III 引火・爆発のおそれのある場所では使わない nifi cation by 1.4 ×. Before using this product, please carefully read these ■ Specifi cations la monture d’objectif de l’appareil photo. En faisant attention de ne pas • AF-S NIKKOR 300 mm f/2.8G ED VR II poderá resultar em lesões. F プロパンガス、ガソリン、可燃性スプレーなどの引火性ガスや instructions together with the camera and lens manuals. -
Minolta Electronic Auto-Exposure 35Mm Single Lens Reflex Cameras and CLE
Minolta Electronic Auto-Exposure 35mm Single Lens Reflex Cameras and CLE Minolta's X-series 35mm single lens user the creative choice of aperture and circuitry requires a shutter speed faster reflex cameras combine state-of-the-art shutter-priority automation, plus metered than 1/1000 second. These cameras allow photographic technology with Minolta's tra manual operation at the turn of a lever. The full manual control for employing sophisti ditional fine handling and human engineer photographer can select shutter-priority cated photo techniques. The silent elec ing to achieve precision instruments that operation to freeze action or control the tronic self-timer features a large red LED are totally responsive to creative photogra amount of blur for creative effect. Aperture signal which pulsates with increasing fre phy. Through-the-Iens metering coupled priority operation is not only useful for quency during its ten-second operating with advanced, electronically governed depth-of-field control , auto~exposure with cycle to indicate the approaching exposure. focal-plane shutters provide highly accu bellows, extension tubes and mirror lenses, The Motor Drive 1, designed exclusively rate automatic exposure control. All X but for the control of shutter speed as well . for the XG-M, provides single-frame and series cameras are compatible with the Full metered-manual exposure control continuous-run film advance up to 3.5 vast array of lenses and accessories that allows for special techniques. frames per second. Plus, auto winders and comprise the Minolta single lens reflex A vibration-free electromagnetic shutter "dedicated" automatic electronic flash units system. release triggers the quiet electronic shutter. -
AUTO LENS ADAPTER USER MANUAL LAE-CM-CEF Canon EF/EF-S Lens to Canon EOS-M Camera INTRODUCTION
AUTO LENS ADAPTER USER MANUAL LAE-CM-CEF Canon EF/EF-S Lens to Canon EOS-M Camera INTRODUCTION Thank you for purchasing the Vello LAE-CM-CEF Auto Lens Adapter – Canon EF/EF-S Lens to Canon EOS-M Camera. This adapter allows you to mount any Canon EF or EF-S lens to a Canon EOS-M camera. With an EF or EF-S lens mounted to a Canon EOS-M camera using this adapter, all automatic functions, such as auto focus and auto exposure, are available and fully operational. A removable tripod mount collar with a ¼" socket is included. 2 CONTENTS INCLUDE • Vello LAE-CM-CEF Auto Lens Adapter - Canon EF/EF-S Lens to Canon EOS-M Camera • Front and rear caps • Removable tripod mount collar • User manual 3 INTRODUCTION The Vello Auto Lens Adapter – Canon EF/EF-S Lens to Canon EOS-M Camera can expand the arsenal of lenses for your Canon EOS-M camera using lenses you already own. With this adapter, you can mount any Canon EF or EF-S lens to a Canon EOS-M camera. Just attach the adapter to your EF or EF-S lens, then mount the lens and adapter to your Canon EOS-M camera. 4 When using an EF lens, there will be a crop factor of 1.6x, so that the apparent focal length of the lens will be 1.6x of the actual focal length. With EF-S lenses, there is no apparent change in the focal length. All camera functions will operate normally, including auto focus, auto exposure, and touch-screen modes.