Four ways to get stunning depth of field

Not sure what depth of field is all about?

Everyone loves photos with a sharply defined subject and a blurry, indistinct background. This powerful photographic effect has been used for ages--and it's shallow depth of field at work. Not sure what depth of field is all about? Check out "Master Your Camera's Depth of Field." This week, I've rounded up four ways for you to take control of the depth of field in your photos.

1. The Natural Way: Aperture Control

You probably already know that your camera controls exposure by balancing aperture size and shutter speed. You can combine a faster shutter speed with a bigger aperture, or a slower shutter with a smaller aperture. There's no single correct exposure setting for any photo; there are many, as long as you keep those two values in balance.

That knowledge is handy because it lets you control the depth of field by choosing the right aperture for a scene. The bigger the aperture (which corresponds to a smaller f/stop number), the more shallow your depth of field. The easiest way to do this is to set your camera to Aperture Priority, and then dial in the aperture value you want--the camera will automatically respond with the right shutter speed.

173806-dof_marin_original

You can see the effect of varying the aperture in the side-by-side examples shown here. On the left, I used an aperture of f/16 to make the background relatively sharp. On the right, the larger opening afforded by an f/8 setting muted the background instead.

2. Fake It With Layers

Of course, this is the digital age: You can always fix a photo, as they say in the movie business, "in post."

Let's say that you want to blur the background of a photo. You can use layers to do that easily in Adobe Photoshop Elements or almost any other image editor. For a refresher, you might want to check out my recent tutorial on using layers in Photoshop Elements.

173806-ap_blur_original

Here's the skinny on this technique: Open the photo in Photoshop Elements and choose Layer, Duplicate Layer. Then, with the top layer selected, choose Filter, Blue, Gaussian Blur, and apply some blur to the image. You can apply more if you want to; you can do it more than once, like putting layers of wax on your car.

When the background looks sufficiently blurry, choose the Eraser tool from the toolbar on the left side of the screen, and erase the now-blurry subject, revealing the sharp original from the layer underneath. For the best results, select a brush shape with a soft edge from the drop-down menu in the options palette at the top of the screen.

3. Fake It With Selections

There are many ways to blur your background in Photoshop Elements. Another approach is to select the subject using a selection tool like the Magnetic Lasso, and then choose Select, Inverse from the menu to select the background instead. Then apply blur to the selected region, leaving the subject sharp and clear.

4. Get Infinite Depth of Field

Sometimes you want a deep depth of field, not the shallow depth that blurring the background gives you. A while back, I found a clever way to get that effect: a program called Helicon Focus.

Helicon works sort of like a panoramic stitching program in that it combines multiple photos into a single, finished image. But instead of a series of overlapping shots, Helicon requires a series of shots of the exact same scene, just varying where the focus is from front to back. The program combines these images into a final photo that is in sharp focus all the way from the foreground to the background. Intrigued? Check out my tutorial on how to use Helicon Focus.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags photographydigital cameras

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Dave Johnson

PC World (US online)
Show Comments

Essentials

Mobile

Exec

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Aysha Strobbe

Microsoft Office 365/HP Spectre x360

Microsoft Office continues to make a student’s life that little bit easier by offering reliable, easy to use, time-saving functionality, while continuing to develop new features that further enhance what is already a formidable collection of applications

Michael Hargreaves

Microsoft Office 365/Dell XPS 15 2-in-1

I’d recommend a Dell XPS 15 2-in-1 and the new Windows 10 to anyone who needs to get serious work done (before you kick back on your couch with your favourite Netflix show.)

Maryellen Rose George

Brother PT-P750W

It’s useful for office tasks as well as pragmatic labelling of equipment and storage – just don’t get too excited and label everything in sight!

Cathy Giles

Brother MFC-L8900CDW

The Brother MFC-L8900CDW is an absolute stand out. I struggle to fault it.

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?