light | wolfcrow - Part 2
Categories
MEM Driving Miss Digital

Notes by Dr. Optoglass: The F-numbers of the Eye

Topics Covered: Typical F-numbers for various scenarios How to find f-stop T-stop The F-numbers of the Eye If I could steal someone’s dream myself, I’d have to go for one of Orson Welles – Christopher Nolan We have all the formulas we need to calculate f-numbers at various ISOs based on lux levels. Here is […]

Categories
MEM Driving Miss Digital

Notes by Dr. Optoglass: How to Read Light for Exposure

Topics Covered: Light meter – Incident and Reflective Lux, EV and Common Scenarios The Inverse Square Law Art is never finished, only abandoned – Leonardo da Vinci Now that we know what an exposure is, we are ready to measure it. There are two ways in which to do this: Using an incident light meter […]

Categories
MEM Driving Miss Digital

Notes by Dr. Optoglass: Camera Exposure

Topics Covered: Exposure and Camera Exposure Exposure Value (EV) and Stops F-number and Shutter speeds Look and think before opening the shutter. The heart and mind are the true lens of the camera – Yousuf Karsh This is how a camera works: The sensor is a jar that can take in light till a certain […]

Categories
MEM Driving Miss Digital

Notes by Dr. Optoglass: The Units of Photometry – Part II

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 […]

Categories
MEM Driving Miss Digital

Notes by Dr. Optoglass: The Units of Photometry – Part I

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 […]

Categories
MEM Driving Miss Digital

Notes by Dr. Optoglass: How to Measure Light

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, […]