What to do when auto exposure doesn’t work

by Steve Berardi

Photo by Steve Berardi

Photo by Steve Berardi

If you haven’t ventured into the world of manual exposure yet, then you may have noticed that auto exposure doesn’t always work too well. Sometimes changing your metering mode can help, but if that fails, what do you do?

Fortunately, there’s another method that can help you get that perfect exposure, while still avoiding the world of full manual. This method is known as bracketing exposures.

When you bracket exposures, you basically tell your camera to automatically take multiple exposures instead of just one (it’ll take one exposure lighter and one darker). All this does is increase the chances of you getting that perfect exposure. However, there’s no guarantee this lighter or darker exposure will be perfect.

The three photos at the beginning of this post are an example of bracketing exposures. The middle shot is the camera’s suggested exposure, and the two shots on the sides are the darker/lighter shots.

How to enable exposure bracketing

To enable bracketing, check your camera’s manual (it’ll be different on every camera). You’ll probably have to go into one of the menus and turn it on somewhere.

Your camera will likely give you the option of how much you want to bracket your shots (i.e. how much lighter or darker should the additional shots be from the suggested auto exposure?). There’s no one answer for what works best here, but most of the time a 1-stop difference works well.

When to use exposure bracketing

A lot of photographers say exposure bracketing should be avoided–that you should always know the perfect exposure when you look at a scene. But, I think bracketing can be useful in at least two cases:

  • You’re still learning about exposure, and you’re not ready for manual, but you’re getting frustrated with the deficiencies of auto exposure
  • You’re photographing a landscape at sunrise/sunset and with the light changing so quickly, it’s difficult to determine the perfect exposure instantly

So, don’t be afraid to bracket exposures! Remember your end goal: to capture that scene perfectly :)

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steveb2About the Author: Steve Berardi is a naturalist, photographer, computer scientist, and founder of PhotoNaturalist. You can usually find him hiking in the San Gabriel Mountains or the Mojave Desert, both located in the beautiful state of California.

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{ 2 trackbacks }

Yes, I knew you couldn’t live without it: the return of photo links | Chuqui 3.0
June 11, 2009 at 10:16 pm
What to do when auto exposure doesn?¢‚Ǩ‚Ñ¢t work | Digital Photography Live
June 29, 2009 at 6:31 pm

{ 3 comments… read them below or add one }

Heather June 7, 2009 at 2:57 pm

Nice post, Steve, and thanks for thinking of those of us who still don’t live in a fully manual shooting world. I’ve tried bracketing a few times, and it was okay for me, but what I’ve really been concentrating on a lot recently is adjusting EV steps to get a better exposure. I’ve been paying more attention to my histogram and adjusting the EV steps appropriately, and I’ve been pretty pleased with the results. Just today, in fact, I found this to work even better than manual exposure in a dark area because I was maxed out on my f-stops, and I didn’t want to slow the exposure time down any more, so I maxed out my EV steps, too, and got a rather passable picture!
Ultimately, when still in the learning phases it’s all about experimentation.

Steve Berardi June 9, 2009 at 3:41 pm

@Heather – thanks for mentioning exposure compensation (EV). That’s another great tool for tweaking auto exposures. As you said, it works great when combined with the knowledge of the histogram, and you’ve inspired me to write an article about this now!

Heather June 13, 2009 at 9:19 am

That’s great! I’ll look forward to reading it!

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