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We all know that light is the first consideration in photography. Everything else comes after that. Well, if light is so important, why do so many photographers take chances with their exposure settings?

Fixing it on the computer afterwards will never be as good as getting it right in camera. Aside from that, it’s a huge waste of time. I’d rather be photographing than fiddling with Lightroom or Photoshop.

The problem started with our all singing, all dancing digital cameras. They’re incredible machines and most of us don’t use even 50% of the technology. It’s become a bad habit to…

  • Take a picture.
  • Look at the LCD screen.
  • If it looks good, fine.
  • If it doesn’t look good.
  • Adjust a thing or two and take another shot.
  • And another.
  • And another.
  • If it’s still not right, fix it in Photoshop or Lightroom.

You end up with a bunch of bad photos of the same thing before you get to what looks like a good photo. And that’s according to the screen on the back of your camera. Which you can’t see properly outdoors anyway.

After all that effort, you load your photos to your computer, and they don’t look as good as you thought. So disappointing!

Further reading on setting exposure: Understanding how exposure metering works

I know how to read a histogram, so I’m fine

If you know how to read a histogram, you’re one step ahead of many. You can keep shooting and adjusting until your histogram looks good.

Do you know the weaknesses of the histogram?

If you do, great! Chances are you got a good exposure. But not always. It’s not exact and accuracy is just not guaranteed.

How many photos did you take before you got to that good exposure?

Further reading: How to read a histogram and why it’s not perfect

Using a light meter to measure flash light

Imagine a guaranteed accurate exposure solution

What if there was a way that you could dial in your settings and know that the exposure would be correct? No wasting time shooting the same thing over and over to get to a good exposure. That would seem like a good idea, right?

You could get the shot you wanted and move on quickly before…

  • The scene changes.
  • Or your model/partner/friend/kids/dog, or worst of all, client gets bored and their expression becomes stale.
  • Or the kids/dog stop cooperating and run off.

Set your exposure quickly

Well, there is a solution. A really good one! Here’s the kicker, it’s a really old tool that was once an essential bit of kit in a photographer’s bag.

With the advent of digital many photographers felt they didn’t need it. They just take a shot, look at the back of their camera, make adjustments and try again.

Things are changing. Photographers are going back to using an incident light meter.

Photographers are starting to realise that their camera’s inbuilt light meter has its failings. So they’re looking for a reliable way to cut down on all the faffing before getting the actual shot.

More photographers are using off camera flash and getting bogged down taking ages to set up a shoot. Maybe not so much when using just one light.

If you use two or more lights, without setting your lighting ratios using a light meter, you’re wasting so much time and leaving so much to chance. What’s more, every time you change set you have to reset your lights.

Save time setting up and you’ll have more time photographing.

So what is an incident light meter?

It’s a handheld light meter. Like the light meter in your camera, it measures light so that you can adjust your camera settings and lighting to ensure accurate exposures.

An incident light meter measures both natural light and flash.

Sekonic L-358 light meter for ambient light

A light meter set to measure ambient light. The F refers to the f-stop and the T is the shutter speed. I set the ISO to 200 (see top right) and the aperture to f4. I then measured the light and was given a shutter speed of 1/80.

Sekonic L-358 incident light meter

The light meter is set to measure flash. The ISO is set to 200 and the shutter speed is set to 200. When the flash triggers the light meter will measure the light and give me a reading of the f-stop, which is currently set to 0.

But my camera has a light meter

The obvious question then is what’s the point of another light meter if my camera already has one? Well, this one is different from the light meter in your camera and much more accurate.

Your camera’s light meter is great, but it’s not always correct and it can’t measure flash output.

How does an incident light meter differ from a camera’s light meter?

An incident light meter measures the light falling onto your subject. It can measure flash light and ambient light (whether it’s natural, tungsten, halogen etc etc).

The light meter in your camera is a reflective light meter. It measures the light bouncing off your subject. It can only measure ambient light, not flash.

Your camera’s light meter is confused by really bright or really dark scenes and subjects. Examples are snow or a white sandy beach, or photographing a black cat on a black couch.

A incident light meter will give you an accurate reading regardless of what the light falls on.

Why don’t more photographers use light meters?

I often wonder this. Why would you spend huge amounts on gear and then ignore the one thing that can make your life easier and your photography better?

  • It might be a cost thing. Maybe because with digital you can shoot and check and shoot and check, people don’t want to spend on a light meter. Buy a used light meter.

 

  • It might be an overwhelm thing. Learning to use a light meter is adding another layer of tech. It’s another thing to learn. Light meters are so easy to use, even if they don’t look it!

 

  • It might be a knowledge thing. If more professional studio photographers told new photographers to learn how to use a light meter, it would be a normal thing. Seriously, get a light meter.

I would never be without a light meter

I’ve had my current light meter, a Sekonic L-358, for at least 12 years. It lives in my bag and I would never consider heading out to a shoot without it, even though I use Profoto lights that can be set to TTL mode. Every time my lights come out, so does my light meter. I don’t use it for every natural light shoot, but I do use it a lot.

The L-358 has been superseded, but you can still pick them up second hand for half the price of newer models. It’s 100% reliable and accurate. It will continue to work for many, many years, saving me time on set and sparing me the disappointment of badly exposed photos.

Give it a go and you’ll understand why you need a light meter. You’ll never look back.

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Is accurate exposure important to you? Are you using a light meter? A light meter is an essential tool for any photographer serious about taking great photos, especially if using flash. Find out why you need a light meter. #lightmeter #exposure #photography #learnphotography #thelenslounge
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