Professor Newman looks at depth of field from the standpoint of what happens in front of the lens
Bob Newman
Advanced technology guide: The ultra-wide lens phenomenon
What are the technological developments that have led to building and using wider and wider lenses?
Advanced technology guide: The optimal format?
With its 1in sensor, the Panasonic Lumix DMC-TZ100 is capable of matching full-frame – with limitations
Advanced technology guide: Information theory
How to manage exposure to maximise information rather than manipulate output brightness
Advanced technology guide: Light-emitting diode
The popularity of the light-emitting diode has led to a decline in flash tubes, but why is the LED so popular?
Advanced technology guide: the art of focus pulling
With stills cameras now the norm for filmmaking, why haven't cine lenses changed accordingly?
Advanced technology guide: bokeh and lens design
What factors determine the appearance of bokeh and how far will people go to achieve this effect?
Advanced technology guide: the limitations of the JPEG
Bob Newman explains why the JPEG format isn't perfect and why its proposed replacement is no better
Advanced technology guide: a camera’s ‘reach’ – photographing distant objects
Bob Newman looks at the factors affecting how a camera system renders an image of a distant object
Advanced technology guide: autofocus motors
The motors that drive a camera's autofocus system have changed dramatically since the first one in 1985
Advanced technology guide: focal-plane shutter
The focal-plane shutter is an outstanding mechanism that deserves to be appreciated
Advanced technology guide: electronic shutters
Bob Newman discusses how electronic shutters work and the operation of the most common shutter types
Advanced technology guide: why high pixel counts matter
Bob Newman says that early critics of high pixel counts on digital cameras were misguided
Advanced technology guide: the modern autofocus
Bob Newman explains how the sophisticated autofocus system on the Nikon D500 stays on track, even when following erratically moving objects
Advanced technology guide: camera hacks
The manufacturers may not like them, but a well-chosen hack can add functionality to your camera.
Advanced technology guide: comparing lens speeds
At first glance, one camera lens can appear to be faster than the other, but is this actually the case?
Advanced technology guide: dynamic reversal
Canon and Nikon’s new, top-end cameras are, at first glance, quite similar, until you look below the surface
Advanced technology guide: silver halide photography
Nowadays, analogue is used to describe ‘old school’ silver halide photography, yet up close, it’s pure digital
Advanced technology guide: raw conversion, mild or aggressive?
When it comes to converting your files, what’s the difference between ‘mild’ and ‘aggressive’?
Advanced technology guide: JPEGS, the raw truth
Bob Newman explains why the camera JPEG can often be better than the raw file