OM System Bird & Wildlife Photography Settings: How to React Faster in the Field

Bird and wildlife photography doesn’t give you time to think. Subjects move fast. Light changes quickly. And the difference between getting the shot and missing it often comes down to how fast you can react.

One of the biggest improvements you can make isn’t buying new gear—it’s learning your camera well enough that you can change critical settings without taking your eye off the viewfinder.

That’s where memorization and muscle memory come in.

In this post, I’ll walk through the key settings I’ve learned to adjust by feel on my OM System OM-1. While I shoot in aperture priority, this approach works just as well in shutter priority or manual. The goal isn’t the mode—it’s being able to react instantly.

While I’m using the OM System OM-1 in this post, most of these settings and controls apply across OM System cameras, including newer bodies like the OM-3 and OM-5. Button placement and naming may vary slightly, but the overall approach—quick access, muscle memory, and fast adjustments—translates directly across the system.

Why Memorization Matters More Than Setup

You can have the perfect custom setup on your camera, but if you have to look down to find a button, you’re already too late.

Bird and wildlife photography is about reaction time. Memorizing where your key controls are—and practicing until it becomes second nature—lets you stay locked on your subject.

Spend a few minutes every morning running through these controls without looking. It sounds simple, but after a couple of weeks, it makes a noticeable difference in the field.

My Approach

I shoot in aperture priority because it’s what I’m used to, and it works well for birds and wildlife. I generally keep the aperture as wide as possible to maintain fast shutter speeds, letting ISO float as needed.

If you shoot in shutter priority or manual, the same concept applies—the key is knowing where your controls are and being able to adjust them instantly.

Most of my wildlife work is done with the OM System 150–400mm f/4.5 TC1.25x IS PRO, which gives me the reach and flexibility needed for birds and distant wildlife.

I’ve put together a detailed breakdown of how this lens performs in real-world conditions in my hands-on field experience with the OM System 150–400mm f/4.5.

Key Settings to Memorize

These are the controls I rely on most when I’m in the field photographing Birds and Wildlife.

ISO

Control: ISO button (upper right on the back) + rear dial

ISO is the setting I adjust most frequently as lighting conditions change. Whether a bird moves from shade into sunlight or clouds roll in, you need to react quickly.  

My preference is to adjust ISO manually rather than relying on Auto ISO so I can control both exposure and noise more precisely as conditions change.  That said, Auto ISO can still be useful in rapidly changing conditions when you need to prioritize shutter speed above all else.

The OM-1 makes changing the ISO easy:

• Press the ISO button with your thumb
• Turn the rear dial
• Keep your eye in the viewfinder

Aperture

Control: Rear dial

In most situations, I keep the aperture wide open to maintain fast shutter speeds.

There are times to stop down:

• Multiple birds in flight
• Two animals at different distances
• Environmental wildlife shots

Being able to adjust aperture quickly lets you adapt without missing the moment.

Exposure Compensation

Control: Front dial

Exposure compensation is one of the quickest ways to adjust exposure without changing multiple settings.

I use it when the scene is likely to fool the camera’s meter, such as:
• Bright subjects like white birds or snow → reduce exposure to protect highlights
• Dark subjects against bright backgrounds → increase exposure to retain detail

It’s a fast adjustment that lets you react to changing conditions while keeping your eye in the viewfinder.

Subject Detection

Control: AF-ON button

I use the AF-ON button to control subject detection since I don’t use back button focus.

• Press and release → toggle subject detection on & off
• Press and hold + front dial → switch subject type

This is especially useful when:

• You switch between birds and mammals
• Subject detection struggles in cluttered scenes

Multi Selector (AF Target Control)

Control: Multi Selector (joystick on the back of the camera)

The Multi Selector is one of the most important controls for quickly placing your focus point—especially when you’re using more precise focus settings.

The Multi Selector is one of the most important controls for placing your focus point exactly where you need it—especially when using smaller or more precise AF target areas.

I rely on it whenever I need to reposition focus quickly without taking my eye off the viewfinder, such as when a bird moves across the frame or shifts position unexpectedly. It also allows me to quickly change the AF target area on the fly when I need more or less coverage depending on the situation.

How I Use It
• Move the Multi Selector → shifts the AF target area across the frame
• Press the Multi Selector → instantly centers the AF target area
• Press and hold + front dial → cycles through AF target area modes

Custom Modes (Where Everything Comes Together)

Custom modes are the backbone of my wildlife setup.

I use three custom modes for birds and wildlife, all next to each other on the dial:

C2 – Precision Focus

• SAF (Single AF)
• Single focus point
• Subject detection Off

Best for:

• Shooting through branches
• When subject detection misses
• Pinpoint focus control

C3 – Primary Bird / Wildlife Mode

• CAF (Continuous AF)
• Custom focus area (most of the frame)
• Subject detection ON (usually bird mode)

This is my default mode.

If I’m out shooting, my camera is almost always set to C3. It works for birds in flight and general wildlife photography.

C4 – Pro Capture Action Mode

• CAF
• Pro Capture
• Subject detection ON
• Higher ISO to freeze movement

Best for:

• Bird Takeoff shots
• Sudden movement (like animals jumping)
• Action sequences

I don’t typically use this for birds already in flight—I use C3 for that. C4 is for capturing the moment something happens.

Why Custom Mode Placement Matters

I keep these modes next to each other so I can switch by feel:

• One click clockwise → C2 (precision)
• One click counter clockwise → C4 (action)

If you know where each mode is without looking, you can adapt instantly in the field.

Note: If I switch modes for a specific situation, I always return to C3 so I know exactly where I am when I’m shooting.

Practice: The Missing Piece

None of this matters if you don’t practice it.

A simple routine:

• Spend 5 minutes a day
• Change each setting without looking

After a couple of weeks, it becomes second nature.

If you haven’t photographed wildlife in a while, it’s worth repeating this exercise before heading out in the field.

Final Thoughts

Bird and wildlife photography is all about reacting quickly. You can’t do that if you’re looking down at your camera trying to find a button.

The more you memorize your setup, the more you can focus on:

• Composition
• Timing
• Behavior

And that’s what ultimately leads to better images.

Continue Learning

If you found this helpful, you might also like:

• How the Multi Function Button Works on Olympus / OM System Cameras and Why You Should Use it
• Exploring the OM System 150-400mm f/4.5: A Hands-On Field Experience
• Are Micro Four Thirds Lens Kits Still Smaller and Lighter Than Full Frame for Travel?