The following shots of yesterday’s student are a good example of why we use flash to create dramatic portraits outdoors, on a sunny day.
Say you take a snapshot, in automatic mode, of a person on a sunny day around noon. You get this:
A snapshot. Composition is fine, but the person is half overexposed, half underexposed; the sky is washed out. It’s why people say you cannot take photos at mid-day on a sunny day.
But flash comes to the rescue.
- Set your aperture, ISO and shutter speed to get a nice darker background. I like dramatic, so in my case this is a very dark background. Dark colour is saturated colour. Start by going to the fastest shutter speed you can use when using a flash (e.g. 1/250th second), then set aperture and ISO to get darkness. (I used manual mode, and set my camera to 200 ISO, f/13 in my case).
- Use a flash in a modifier – to “nuke the sun” (overpower sunlight). This needs to be a powerful strobe, or a speedlight very close to the subject. I used a Bowens strobe with a softbox, powered from a Travel Kit battery.
- Now meter the flash, using a flash meter (or trial and error). Adjust the strobe until you read the same aperture you just set.
Now you get this:
Isn’t that much better? The subject is now the “bright pixels”. And bright pixels, as you know, are sharp pixels!
When you cannot focus, you cannot take a picture.
And to focus, you need
- A subject (lines/contrast)
- Enough distance (depending on your lens(
- Enough Light
There is often insufficient light. And that can make focusing very difficult.
One thing that can help is your flash. Look at the photographer here, a colleague at a recent shoot:
As you can see on his hand, the flash is emitting some red lines. Those red lines are thre “focus assist” lines. The flash emits these when there is insufficient light. You can even use this function when flash firing is disabled: the flash can be useful in more ways than you thought!
There are two ways to use flash. Always keep that in mind, because you decide which one it is for any given shot.
2. Flash as the only light source. You would do this in a studio setting.
If you want this, select an aperture-shutter-ISO combination that makes the available light go dark. Like 1/125th second, f/8, 200 ISO:
2: Flash mixed with available light. You would do this at a party.
If you want this, select an aperture-shutter-ISO combination that makes the available light show up too – maybe two stops below normal. Like 400 ISO, 1/40th sec, f/4 (the“Willems 444 rule”):
Simple, once you realize this: the flash is separate from the ambient light. In TTL mode, flash is metered separately.
Alas, I am not talking at the Exposure show this year, for the first time in many years.
But to compensate, you can watch a lecture I gave at last year’s show!
Go here and watch – 41 minutes – to learn a little about lenses and what they do for you.