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## What is Aperture and F-Stop?

What is aperture and f-stop? A simple way to remember and deal with the numbers you see on a lens.

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## How to find the Best Carry-On Luggage for Camera and Video Rigs

How to solve the problem of finding the best carry-on luggage for video work, for international airline travel.

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## A Comparison of the Specifications of Four Light Meters

Which is the most future-proof light meter? A comparison of the features of four light meters.

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## What is the Difference between Exposure Latitude and Dynamic Range?

The simplest explanation of the difference between exposure latitude of a camera and its dynamic range.

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## A Comparison of Light Fixture Output and Photometrics (Part One): Tungsten

To compare the photometric (light outputs) data of two fixtures is time consuming. Here’s a handy chart.

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## What is a Cine Lens and Why must it be different from a Photo Lens?

A simple explanation of what a cine lens is and how it is different to a photo lens.

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## A Comparison of Prime Cine Lens Kits costing less than \$10,000 per Lens

This article compares many prime cine lens kits costing less than \$10,000 per lens (or even less than \$5,000 per lens).

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## 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 […]

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## 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 […]

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## 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 […]