Photos : réglage de Focale. 1. Notion La focale correspond à la distance entre la projection sur le capteur d'un point situé à l'infini et la lentille. Elle se mesure en millimètre (mm). Cette unité est standardisée y compris dans les pays pour lesquels le mètre n'est pas l'unité principale. La focale entre dans le calcul de la profondeur de champs, avec l'ouverture, ainsi que la distance du sujet et la taille du capteur. Les valeurs grand public varient de 16mm (pour les grands angles) à 400mm (pour les téléobjectifs). Il faut bien voir que la valeur de la focale inscrite sur l'objectif est celle qui correspond à un capteur type 24x36 (appareil argentique classique, ou capteur full-frame pour les appareils numériques). Un dernier point : lorsque les spécs techniques parlent d'un zoom de 10x, cela signifie qu'il y a un rapport de 10 entre la focale la plus grande et la focale la plus petite de l'appareil. 2. 3.
Big Aperture: Add Depth Of Field, Lighting & Bokeh Effect To Any Photo [Mac] The Problem With The Focus-Recompose Method. Primed: Why your camera's sensor size matters. Primed goes in-depth on the technobabble you hear on Engadget every day -- we dig deep into each topic's history and how it benefits our lives. You can follow the series here. Looking to suggest a piece of technology for us to break down? Drop us a line at primed *at* engadget *dawt* com. The first thing I look for when purchasing a camera is something most aren't even aware of. In writing my first installment for Primed, I'll give a few definitions to clear things up a bit when it comes to a camera's image sensors and size, explain in detail the parts of a sensor, how it alters the photos (or video) you capture, where it came from, and why it's important to consider its size – I'll cover the meat and bones, get to the heart of the matter, the nub, the crux, the nuts and bolts, get down to the brass tacks, all while exhausting our thesaurus.
Table of Contents In today's digital SLR camera, the image sensor is what film was to a 35mm SLR camera. Detail Quality and detail go hand in hand. The Luminous Landscape. Celebrating Our 15th Year Kilt Rock - Mealt Falls, November 2014 - Isle Of Skye, Scotland Fuji X-T1, 55-200mm at 74mm, f/8, 7.4 sec ISO 800, Lee Big Stopper by Kevin Raber There are Currently 184 Photographers Visiting The Luminous Landscape The contents of this site were last updated on 30 November, 2014 Michael's Phlog was just updated on October 21 lu-mi-nous (lue'muh nuhs) adj. 1. radiating or reflecting light; shining; bright. 2. clear; readily intelligible Welcome to The Luminous Landscape, the web’s most comprehensive site devoted to the art and technique of photography.
The Publisher of this site is Kevin Raber. Optimizing Exposure. Why Do Camera Makers Give Us19th Century Exposures With Our 21st Century Cameras? Lace and Forest. Clearview, Ontario. July, 2011 Fuji X100 @ ISO 400 A Bit of Background Information In 2003 I wrote a tutorial titled Expose Right. The main points of that essay, summarized and updated, are as follows..... A cameras sensor is an analogue device. So What? OK. Cloud Painting. Fuji X100 @ ISO 200 Black Cats and White Cats Let's imagine two cats. What do these look like? Why? Take a picture of a typical scene, one with light tones, dark tones and medium tones, and a light meter or even the nifty 500 segment super-meter in your DSLR will do a pretty good job.
The Clever Photographer But, of course we're more clever than our dumb cameras. Right? But – Not For Digital! In the case of the white cat and snow – yes – you would do the same as for film – increase the exposure so that it looked correct. Why? Well, there is the story of Willy Sutton the famous American bank robber. Some Caveats Early Corn. Easy.
White Balance. Missing Pages: Aperture and Shutter Priority. Tips for Using Your Camera Creatively by Jon Sienkiewicz , April 2009 (updated November 2009) Introduction | I: ISO Setting | II: Program AE | III : Aperture & Shutter Priority | IV: White Balance | V: Depth of Field | VI: Bracketing | VII : Megapixels | VIII : Flash Modes column is a collection of all of the information that should have been included in your camera’s Owner’s Manual—but somehow got left out. This is a hybrid assortment of short articles that delivers the know-how you need to derive the maximum enjoyment—and creative expression—from your equipment. It’s sort of a juiced-up User Guide for creative people who are not necessarily technical. Each part will teach you how to use one of the camera features or functions that you previously ignored or left set on Auto. We will explain complex technical subject matter a way that everyone can understand.
Installment III : Aperture & Shutter Priority Each system has its own set of distinct advantages and disadvantages. Shutter Priority. Photography Basics. Ever wonder what it is that actually makes a camera work? This tutorial will cover the inner workings of a camera, and introduce you into photography basics and the expansive world of taking better photographs. To take beautiful photographs you do not need an expensive camera and a bag full of equipment. What is important is the photographer’s ability to see his/her surrounding and use knowledge and personal feel for the subject.
Being the first article in a series, this lesson is meant to only cover the basics of photography. The idea with this series is to get people more interested in photography, awaken creativity and hopefully help people enjoy this hobby even more. The community here at Tutorial9 is an important part of this series and I would love to hear your feedback and questions. An introduction to Photography The word “photography” is French but is based on Greek word and literarily means “drawing with light“. Aperture ƒ/# 1.4 2 2.8 4 5.6 8 11 16 22 32 Shutter.
Understanding Digital Camera Histograms: Tones and Contrast. Understanding image histograms is probably the single most important concept to become familiar with when working with pictures from a digital camera. A histogram can tell you whether or not your image has been properly exposed, whether the lighting is harsh or flat, and what adjustments will work best. It will not only improve your skills on the computer, but as a photographer as well.
Each pixel in an image has a color which has been produced by some combination of the primary colors red, green, and blue (RGB). Each of these colors can have a brightness value ranging from 0 to 255 for a digital image with a bit depth of 8-bits. The region where most of the brightness values are present is called the "tonal range. " The above image is an example which contains a very broad tonal range, with markers to illustrate where regions in the scene map to brightness levels on the histogram. Lighting is often not as extreme as the last example. S'y retrouver dans la taille des capteurs en photo numérique. Il est admis que plus un capteur est grand, et plus la qualité de l'image sera élevée. Reste à pouvoir se retrouver dans l'univers des mesures des capteurs photos.
La taille exprimée en pouces découle directement de l'age de la TV à tube. Cette mesure se réfère directement au diamètre du cercle dans lequel s'inscrit le capteur sans pour autant en occuper la totalité. La diagonale du capteur est globalement égale au 2/3 de la taille indiquée. Voici un schéma comparatif des principaux format de capteurs disponible sur le marché. Licence : Creative Commons - Author Mofyre Pourquoi choisir un grand capteur ? Mais en quoi un grand capteur est-il meilleur ? Toujours schématiquement, un capteur n'est pas fait d'une seule cellule (photosite) qui capte la lumière, mais de plusieurs millions. Ces éléments éclairent notre position farouchement anti "course aux mégapixels" que se livrent les constructeurs d'appareils photo. Du reflex au compact : éventail des tailles Nos sélections d'appareils photos.