Important Quirks and Features of the Sony A7s for both Stills and Video

A list of important quirks and features one should know about the Sony A7s before shooting stills or video.

The Complete Guide to Camera Batteries (Part One)

How many batteries should you buy with your camera? This easy guide will show you how to plan your camera batteries for professional use.

How to Estimate if your Lights and Gear will work on Portable Generators and the Mains Power Supply (Part Three): Generators

The simplest way to figure out how many lights or devices you can plug in to a socket or generator. Part Three covers portable generators.

How to Estimate if your Lights and Gear will work on Portable Generators and the Mains Power Supply (Part Two): Mains

The simplest way to figure out how many lights or devices you can plug in to a socket or generator. Part Two covers the mains supply.

Notes by Dr. Optoglass: Color Bit Depth, Middle Grey and White Balance of the Human Eye

Topics Covered: Color Bit Depth Middle Grey Whiteness and White Balance Colors, like features, follow the changes of the emotions – Pablo Picasso We have already seen that the color space of the eye, as defined by the CIE 1931 XYZ color space, estimates about 10 million colors for our vision. The word size required […]

Notes by Dr. Optoglass: Dynamic Range of the Human Eye

Topics Covered: Contrast Ratio Static and Dynamic Range The Dynamic Range of the Human Eye Contrast Sensitivity By painting colors and lines and forms seen in quickened mood I was seeking to make this mood vibrate as a phonograph does – Edvard Munch The following image has two objects – can you see them? No? […]

Notes by Dr. Optoglass: Sensitivity and ISO of the Human Eye

Topics Covered: Sensitivity ISO The ISO Range of the Human Eye Photography to the amateur is recreation, to the professional it is work, and hard work too, no matter how pleasurable it my be – Edward Weston A camera sensor (or film) is like a sponge: It has the ability to soak in light. How […]

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 […]