CAMERA CL INIC
Master the art of modern photography
NEW SERIES!
This month: ISO All you need to know about the most important three letters in digital imaging
For this autumnal tree image, we used a tripod-mounted Nikon D810 at ISO 100 for an exposure of 1/50 sec at f/11.
Will Cheung
An imaging journalist and freelance photographer based in London, Cheung has a wealth of experience over several decades. www.williamcheung.co.uk
Of the three exposure musketeers, ISO is the most recent. That’s not because film speed hasn’t been around for a long time – because it has – but with film, it isn’t possible to change speed with the same joyous alacrity that we can on our digital cameras. Essentially, you are limited to the film’s quoted speed. Of course, you can always underexpose for richer colours or push-process, or shoot half the roll at one speed and the other at a different speed and then clip test during processing, but ultimately, your options are limited.