Day 5 travel Push up skills
To be effective in the dark you need lose any fear of pushing up the ISO and take the grain with the gain!
Too many photographers have an irrational fear of pushing up ISO. Years ago, changing ISO meant changing your film, but nowadays you can tweak your Nikon’s all-important sensitivity control for every shot. The fear today is of noise – digital grain that creeps in gradually as you turn up the ISO.
However, there are two good reasons whey you should learn to love the big-number ISO settings. The first is to remember the first rule of Boot Camp (see page 32)... Boosting the camera’s electronic gain is a very simple and effective way of beating unintentional blur created by camera shake or subject movement. Remember, it is always better to have a grainy shot than a blurry one.
Second, high ISO settings are liberating. They let you take pictures in situations where you simply wouldn’t otherwise get a shot: in places where you just can’t use a tripod, or even in places that are so dark you can’t even see what is front of your eyes. ISO follows a scale where each time you double the number you get a one-stop increase in sensitivity. So, going from ISO100 to ISO1600 is a four-stop improvement, allowing you to increase the shutter speed from 1/8 sec to 1/125 sec (if the aperture and overall exposure stay the same).