Photography 101: Camera Modes Explained

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Photography 101: Camera Modes Explained

Learning to Take Control Without
Feeling Overwhelmed

Article researched 

by Michael A. Buccilli

When you first begin moving beyond casual photography, a camera can suddenly look a lot more complicated than it did before.

There are buttons everywhere.

Menus inside menus.

Numbers changing on the screen.

Letters such as P, Av, Tv, A, S, and M appear on the mode dial, and somehow you are supposed to know what all of them mean.

If that sounds familiar, I understand.

I had been taking pictures for most of my life when I decided that I wanted to pursue photography professionally. While studying photography through the Art Institute of Pittsburgh online, I used grant and student-loan funds to purchase a Canon EOS Rebel T6 kit.

I remember looking at that camera, seeing all of the buttons, menus, settings, and choices available to me and having one immediate reaction:

This was going to be a lot more complicated than simply pointing a camera at something and pressing the shutter button.

For a while, the camera itself could feel intimidating.

But something changed as I worked through my courses.

I practiced.

Then I practiced some more.

I experimented with settings I did not completely understand yet. I photographed subjects one way, changed something, photographed them again, and looked at what had changed. Sometimes the result was better. Sometimes it was worse.

But every attempt taught me something.

Eventually, the menus became less intimidating. The buttons began to have a purpose. Settings that had once looked like technical clutter became creative choices.

Most importantly, I became less afraid to experiment.

That is one of the things I want beginners to understand early in this Photography 101 series:

You do not need to understand everything about your camera before you begin using it creatively.

Photography becomes much easier when you allow yourself to experiment, study the results, make adjustments, and try again.

And ultimately, the hardest question in photography usually is not:

What camera mode should I use?

It is:

Why am I photographing this subject, and what do I want the photograph to convey?

That question is where photography begins to become something more than camera operation.

From Exposure to Creative Control

In the first Photography 101 article, we explored the three fundamental components of exposure:

Aperture

Shutter speed

ISO

Together, they influence how light and motion are rendered in a photograph.

Aperture affects the amount of light passing through the lens and plays an important role in depth of field.

Shutter speed determines how long the camera records light and can freeze movement or allow motion to blur.

ISO affects how the camera handles the available light and can help us work in darker conditions, although increasingly high ISO settings may introduce more visible noise.

Understanding those three controls gives us the foundation.

Camera modes determine how responsibility for those controls is divided between you and the camera.

Sometimes the camera makes most of the decisions.

Sometimes you make one important decision and allow the camera to calculate another.

Sometimes you make nearly all of the exposure decisions yourself.

None of these approaches is automatically better photography.

They are simply different tools.

Before Choosing a Camera Mode, Ask Why

Imagine standing beside a quiet lake shortly before sunrise.

Mist is drifting across the water.

The mountains in the distance are beginning to catch the morning light.

There are many technically correct ways to photograph that scene.

But what attracted you to it?

Was it the enormous depth of the landscape?

The reflection in the water?

The mist?

The golden light?

The peaceful feeling of standing alone beside the lake?

Perhaps you want everything from the rocks in the foreground to the mountains in the distance to feel sharp and expansive.

Or perhaps a weathered plant along the shoreline caught your attention, and you want the background to dissolve into softness behind it.

Those two photographs may be made from almost the same location.

But they communicate different ideas.

That is why learning photography cannot end with memorizing settings.

Your creative intention should eventually guide the settings you choose.

The camera mode simply helps you get there.

Auto Mode: Sometimes Getting the
Photograph Matters Most

Auto Mode generally gives your camera control over most of the exposure process.

Depending on the camera, it may determine aperture, shutter speed, ISO, white balance, flash behavior, and other settings.

Many beginning photographers are encouraged to leave Auto Mode as quickly as possible.

I do not think Auto needs to be treated like an enemy.

Suppose you are walking through a park and suddenly see something happening that may last only a few seconds.

Perhaps wildlife appears unexpectedly.

Maybe a child does something funny.

Perhaps light suddenly breaks through the clouds in an extraordinary way.

If you are uncertain about your settings and the choice is between using Auto or missing the photograph entirely, use Auto.

A photograph captured in Auto Mode is more valuable than a photograph you never made.

Auto is especially useful while someone is becoming comfortable simply handling a camera.

But Auto also has an important limitation.

Your camera can evaluate light.

It can identify subjects.

Modern cameras can perform extraordinary calculations.

What the camera cannot fully understand is why the scene matters to you.

It does not know whether you want the background soft.

It does not know whether movement should be frozen.

It does not know whether that dark silhouette is a mistake or exactly what you intended.

Those decisions belong to the photographer.

And that is why we eventually begin moving beyond Auto.

Program Mode: A Comfortable First Step

Program Mode is usually identified by the letter:

P

I think Program Mode deserves more attention than it often receives.

Some beginning photographers believe that moving beyond Auto means they should immediately switch to Manual Mode.

That is not necessary.

Program Mode provides an excellent middle ground.

The camera generally chooses the aperture and shutter-speed combination needed for the exposure, while giving you greater access to other photographic controls.

Depending on your camera, you may be able to control things such as ISO, exposure compensation, white balance, autofocus behavior, and other settings.

Some cameras also allow you to alter the aperture and shutter-speed pairing while maintaining a similar overall exposure.

Interestingly, the Canon EOS Rebel T6 that I learned with includes a shiftable Program AE mode, along with shutter-priority, aperture-priority, and manual exposure modes. [1]

Program Mode allows you to begin taking responsibility for the photograph without asking you to control everything simultaneously.

Think of it as removing the training wheels one at a time rather than throwing the bicycle down a hill and hoping for the best.

Aperture Priority: Controlling How
the Photograph Feels

Aperture Priority is one of the camera modes I think many photographers can become comfortable with fairly quickly.

Depending on the camera brand, it may be marked:

A

or

Av

Canon commonly uses Av, while several other manufacturers use A.

In Aperture Priority Mode, you choose the aperture, or f-number, and the camera determines the shutter speed needed for the exposure. How ISO behaves depends on whether you have selected a fixed ISO or enabled Auto ISO and on the specific camera. [2][4]

Why is that useful?

Because aperture has such a strong influence over the visual character of a photograph.

Imagine Photographing a Person

You want the person's face sharp.

But you do not want the parking lot, fence, trees, signs, and everything else behind them competing for attention.

A wider aperture can help create a shallower depth of field, allowing the background to become softer.

Now your viewer's attention stays where you wanted it:

on the person.

Now Turn Toward a Landscape

You are standing before a sweeping valley.

Wildflowers occupy the foreground.

Rolling hills extend through the middle distance.

Mountains rise along the horizon.

Now you may want considerably more of the photograph to appear sharp.

A smaller aperture such as f/8 or f/11 might make more sense, depending on your lens, focusing distance, and other conditions.

Sony's photography guidance illustrates exactly this creative difference: wider apertures can produce stronger background defocus, while smaller apertures can help render more of a landscape clearly. [2]

The important point is not memorizing a particular f-number.

It is understanding why you chose it.

You are using aperture because depth of field contributes to what you want the photograph to communicate.

That is creative control.

Watch the Shutter Speed in Aperture Priority

There is one important habit to develop when using Aperture Priority.

Watch the shutter speed your camera chooses.

As the light becomes dimmer, your camera may select slower shutter speeds.

Eventually, the shutter may become slow enough that camera movement or subject movement causes unwanted blur.

At that point you have choices.

You might:

open the aperture farther,

increase ISO,

use Auto ISO with appropriate limits,

steady the camera,

or place the camera on a tripod.

Aperture Priority allows the camera to help you, but you still need to pay attention to what it is doing.

You and the camera are working together.

Shutter Priority: When Movement
Becomes the Story

Shutter Priority reverses the arrangement.

On many cameras it is marked:

S

Canon generally calls it:

Tv

Tv refers to Time Value.

In this mode, you select the shutter speed and the camera determines the aperture needed for the exposure. Again, ISO behavior depends on your camera configuration. [3][4]

This mode becomes particularly useful when movement is central to the photograph.

Freezing Action

Imagine photographing a bird flying across the water.

Your main concern may not be depth of field.

It may be stopping the movement of the wings.

A fast shutter speed can help freeze that motion.

The same idea applies to:

sports,

wildlife,

children running,

moving vehicles,

waves crashing,

or any other fast-moving subject.

Showing Motion

But movement does not always need to be frozen.

Suppose you are photographing a waterfall.

You may want the water to remain visibly textured and energetic.

Or you may want it to become smooth and almost silky.

Those two interpretations require different shutter-speed choices.

A slower shutter speed allows movement to register during the exposure.

Sony's shutter-speed guidance demonstrates this relationship clearly: fast shutter speeds can freeze movement, while longer exposures can deliberately record motion. [3]

Neither approach is more correct.

The question remains:

What are you trying to convey?

When Shutter Priority Reaches the Lens Limit

Shutter Priority also requires awareness.

Suppose you select an extremely fast shutter speed in low light.

Your camera attempts to compensate by opening the aperture.

But lenses can only open so far.

If the lens reaches its maximum aperture and there still is not enough light, the camera may no longer be able to produce the exposure you intended without another adjustment.

You may need to increase ISO, introduce more light, or select a slower shutter speed.

This is one of the reasons photography becomes easier once aperture, shutter speed, and ISO stop feeling like three unrelated settings.

They work together.

Manual Mode: Taking Direct Control

Manual Mode is represented by:

M

In Manual Mode, the photographer selects both aperture and shutter speed.

ISO may also be selected manually.

However, modern cameras add another useful possibility:

Manual Mode with Auto ISO.

When that feature is available and enabled, you can choose the aperture and shutter speed while allowing the camera to adjust ISO as lighting conditions change. Nikon, for example, documents this behavior in its Auto ISO system. [4]

Traditional full Manual Mode gives you direct control over aperture, shutter speed, and ISO.

That can be extremely useful when consistency matters.

When Manual Mode Makes Sense

Imagine photographing a landscape from a tripod.

The lighting is relatively stable.

You have time.

You want a particular depth of field.

You want a particular shutter speed.

You want to keep ISO low.

Manual Mode allows you to establish those settings deliberately.

It can also be useful for:

night photography,

long exposures,

studio photography,

flash photography,

astrophotography,

panoramas,

and situations where you do not want the camera continually changing exposure between photographs.

But there is something important beginners should hear:

Manual Mode is not a diploma.

You do not graduate from Aperture Priority and become a "real photographer" because you reached M on the dial.

Professional photographers use whatever mode solves the photographic problem in front of them.

Sometimes that is Manual.

Sometimes it is Aperture Priority.

Sometimes it is Shutter Priority.

Sometimes it is Program.

And yes, sometimes getting the photograph matters more than proving you manually selected every setting.

Exposure Compensation: Telling
the Camera, "Almost"

Once you begin using Program, Aperture Priority, or Shutter Priority, another control becomes extremely useful:

Exposure Compensation

You will usually recognize it by the:

+ / -

symbol.

Exposure compensation allows you to tell the camera:

"I see the exposure you selected, but I want the photograph a little brighter."

Or:

"I want it a little darker."

Your camera's meter is trying to interpret the scene according to the information it receives.

Sometimes that interpretation is not what you intended.

Imagine photographing a bright snowy landscape.

The camera may attempt to darken the scene more than you want.

Positive exposure compensation can help move the exposure brighter.

Now imagine a dramatic sunset.

Perhaps you want the sky slightly darker so the color and atmosphere remain rich.

Negative exposure compensation may help accomplish that.

Current Canon cameras provide exposure compensation in their automatic exposure modes, although the exact controls and available ranges vary by camera model. [5]

The important lesson is that automatic and semi-automatic modes do not mean surrendering creative control.

You can still tell the camera:

That is close, but this is what I actually want.

So Which Camera Mode Should You Use?

Instead of asking:

Which camera mode is best?

Ask:

What matters most in this photograph?

If the moment is happening quickly and you simply need the photograph:

Auto Mode may be enough.

If you want more control without managing aperture and shutter speed individually:

Try Program Mode.

If depth of field is central to the photograph:

Try Aperture Priority.

If motion is central:

Try Shutter Priority.

If you need complete consistency or want direct control over both aperture and shutter speed:

Try Manual Mode.

Notice that none of these answers begins with:

"Because professional photographers are supposed to use..."

The photograph determines the tool.

Not the other way around.

A Simple Camera-Mode Exercise

You can read about camera modes for hours.

But at some point, you need to turn the dial.

Choose an ordinary subject.

It does not need to be spectacular.

A flower.

A coffee cup.

A person.

A tree.

A car parked outside.

Anything that allows you to make several photographs without rushing.

Begin in Auto Mode.

Take a picture.

Look at the settings the camera selected.

Then switch to Program Mode.

Take another photograph and explore what additional controls become available.

Next, switch to Aperture Priority.

Choose a wide aperture and take a picture.

Then choose a smaller aperture and photograph the same subject again.

Compare the background and depth of field.

Watch what happens to the shutter speed.

Then switch to Shutter Priority.

Photograph something moving if possible.

Try a faster shutter speed.

Then try a slower one.

Finally, switch to Manual Mode.

Try to create an exposure yourself using what you learned about aperture, shutter speed, and ISO.

Do not worry if some of the photographs fail.

In fact, I hope a few do.

A photograph that does not work can be an excellent teacher if you ask why it failed.

Was the shutter speed too slow?

Was the depth of field too shallow?

Was the ISO unnecessarily high?

Was the photograph too bright?

Too dark?

Did the camera focus somewhere you did not intend?

Each mistake gives you another piece of information.

That is exactly how the camera becomes less intimidating.

Practice Changes the Relationship

I did not become more comfortable with my Canon T6 because one day I suddenly understood every item in the manual.

It happened gradually.

I learned something.

I tried it.

I made photographs.

Then I learned something else.

Over time, the camera stopped feeling like something I might operate incorrectly.

I became willing to experiment.

That willingness is important because photography requires curiosity.

Sometimes you need to ask:

"What happens if I change this?"

And then take the photograph and find out.

Eventually, something interesting happens.

You stop thinking so much about the camera.

Instead, you start looking at the world in front of it.

The Camera Is the Tool. The
Photograph Is the Goal.

Technical knowledge matters.

Understanding aperture matters.

Understanding shutter speed matters.

Understanding ISO, autofocus, lenses, metering, and composition matters.

But the purpose of learning those things is not to become excellent at operating camera controls.

The purpose is to make those controls increasingly invisible.

You want to understand your camera well enough that when something catches your attention, you can begin asking more important questions.

Why did I stop here?

What caught my eye?

What am I trying to show?

What should be included?

What should be left outside the frame?

Should this moment feel peaceful?

Powerful?

Lonely?

Joyful?

Chaotic?

Intimate?

Expansive?

Once you know the answer, your technical decisions begin serving the photograph.

Aperture becomes a way to control attention.

Shutter speed becomes a way to interpret movement.

ISO becomes part of the solution to working with available light.

Camera modes become shortcuts for deciding which controls matter most right now.

And the camera begins doing what it was always supposed to do:

helping you show someone else what you saw.

Don't Be Afraid of the Dial

If you are still using Auto Mode, there is nothing wrong with that.

But try turning the dial.

Spend an afternoon in Program Mode.

On another day, use Aperture Priority.

Photograph movement in Shutter Priority.

When you feel ready, experiment with Manual.

Do not wait until you completely understand a mode before trying it.

Experimentation is part of understanding it.

The letters on the dial that once looked like technical code eventually become familiar choices:

P. Av. Tv. M.

Or:

P. A. S. M.

They stop being intimidating because you understand what each one helps you accomplish.

That is progress.

Not memorizing every menu.

Not using Manual Mode all the time.

Not having the most expensive camera.

Progress is reaching the point where you can look at a subject, recognize what matters about it, and begin making deliberate choices about how you want to photograph it.

What's Next in Photography 101?

We have now taken two important steps.

First, we learned about the exposure triangle:

Aperture, shutter speed, and ISO.

Now we have explored the shooting modes that help us control those settings.

But even a perfectly exposed photograph can still disappoint us if the subject is not sharp where we intended.

So next, we are going to tackle one of the most common questions in photography:

Why isn't my picture sharp?

In the next installment:

Photography 101: How to Get Sharp Photos — Understanding Focus, Autofocus Modes, and Focus Points

We will explore:

autofocus versus manual focus,

single and continuous autofocus,

focus points,

subject tracking,

camera movement,

subject movement,

and how to give your camera a much better chance of focusing exactly where you want it.

Because once exposure and focus begin working together, something wonderful happens.

You spend less time fighting the camera.

And more time making photographs.

Reference Citations:

  [1] Canon U.S.A. — EOS Rebel T6 Support: Canon confirms that the T6 includes shiftable Program AE, Shutter-priority AE, Aperture-priority AE, and Manual exposure. Canon EOS Rebel T6 Support

  [2] Sony — Aperture and A-Mode: explains aperture priority, f-numbers, background defocus, and landscape depth of field. Sony Aperture and A-Mode Guide

  [3] Sony — Shutter Speed and S-Mode: explains freezing motion versus intentionally recording movement with slower shutter speeds. Sony Shutter Speed and S-Mode Guide

  [4] Nikon — Understanding Auto ISO: particularly useful for explaining how Auto ISO can function in P, A, S, and Manual modes. Nikon Understanding Auto ISO

  [5] Canon — Exposure Modes and Compensation: Canon's current cameras continue the familiar P, Tv, Av, and M exposure-mode structure and provide exposure compensation in automatic exposure modes. Canon EOS R6 Support and Exposure Controls