wolfcrow
Topics Covered: Nits and Lux Footcandles and footlamberts Typical light levels for various scenarios Actually, I’m not all that interested in the subject of photography. Once the picture is in the box, I’m not all that interested in what happens next. Hunters, after all, aren’t cooks – Henri Cartier-Bresson In part I we covered measuring […]
Topics Covered: Joules and Watts Lumens and Candelas Lumens per Watt Counting Photons A beautiful thing never gives so much pain as does failing to hear and see it – Michelangelo Let’s start with some radiometry units: Imagine a light bulb has having a total volume (energy) of light that it can pour out during […]
Topics Covered: How Light Works Radiometry vs Photometry What is Brightness Light makes photography. Embrace light. Admire it. Love it. But above all, know light. Know it for all you are worth, and you will know the key to photography – George Eastman The full spectrum of light is represented thus: As you can see, […]
Topics Covered: The Megapixel Count of the Human Eye Rule of Thirds? Whenever I arrive on a real location, I have to move around and work out what the best angles are going to be. When I was moving around with the lens, I discovered things that the naked eye would not have – Pedro […]
Topics Covered: The Airy Disk Diffraction Pixel size of the Eye Pixel density or resolution of the Eye Everybody thinks they know what art should be. But very few of them have the sense that is necessary to experience painting, that is the sense of sight, that sees colors and forms as living reality in […]
Topics Covered: The average and maximum resolutions of the human eye PPI and DPI at various distances Beauty is all very well at first sight; but who ever looks at it when it has been in the house three days? – George Bernard Shaw As we have seen earlier, the average visual acuity of the […]
Topics Covered: The many focal lengths of the eye The focal length of the eye in photographical terms Nature will bear the closest inspection. She invites us to lay our eye level with her smallest leaf, and take an insect view of its plain – Henry David Thoreau Before you get the wrong impression, let’s […]
Topics Covered: The Angle of View of the Eye The Sensor Size of the Eye The Aspect Ratio of the Eye The Crop Factor (35mm equivalent) of the Eye The eye of the master will do more work than both his hands – Benjamin Franklin Put together, the horizontal angle of view of both eyes […]
Topics Covered: The Emsley model of the Eye The Focal Length the Eye The Total Retinal Area of the Eye The health of the eye seems to demand a horizon. We are never tired, so long as we can see far enough – Ralph Waldo Emerson The problem with drawing the geometry of the human […]
Topics Covered: How the Cones produce color The visible spectrum Defining Color Space The CIE XYZ 1931 color space It is the eye of other people that ruin us. If I were blind I would want, neither fine clothes, fine houses or fine furniture – Benjamin Franklin Humans normally have three kinds of cones. They […]