Focus Canon 5d Mark Iv

Master the Focus: A Complete Guide to Canon 5D Mark IV Autofocus

The Canon 5D Mark IV is a legendary full-frame DSLR, beloved by wedding, portrait, and landscape photographers. However, to unlock its full potential, you must master its sophisticated 61-point AF system. Let’s break down everything you need to know.

2. AI Servo AF (For Motion)

This is the "continuous" mode. The camera predicts subject movement and constantly adjusts focus until you take the shot. focus canon 5d mark iv

Use for: Sports, wildlife, children running, wedding processions, video.
Pro tip: AI Servo is useless if you don't adjust Case Settings (see Part 4).

1. The AF System Specs (Quick Overview)

61 AF Points: All are cross-type (sensitive to both horizontal and vertical detail).
41 Cross-type Points: Usable even at f/4.
5 Dual-Cross Points: Active with f/2.8 or faster lenses (incredible precision).
Low Light Capability: Autofocus works down to EV -3 (moonlight conditions).
Dual Pixel CMOS AF: Lightning-fast live view/video autofocus.

6. Best Settings for Specific Genres

1. The 61-Point Hero (Know Your Zones)

The 5D Mark IV features a 61-point AF system with 41 cross-type points. That means it is incredibly sensitive to contrast and light. recompose the shot

The Problem: Beginners leave it on "Auto Selection." The camera then focuses on the closest thing (usually a tree branch or a nose instead of the eye).
The Fix: Switch to Single Point AF. Press the AF point button (top right of the rear dial), then use the Multi-controller (joystick) to move that red dot exactly where you want it.

5. Back Button Focus (The Game Changer)

If you take only one thing away from this post, make it this.

The Default: Half-pressing the shutter focuses and then takes the photo. This causes you to lose focus every time you let go of the button.
The Setup: Go to Custom Controls (C.Fn). Set the shutter button to only Metering start. Set the AF-ON button on the back to only AF start.
The Result: You focus once with your thumb (AF-ON). You shoot with your index finger. You can let go of the shutter, recompose the shot, and the focus stays locked. For tracking a moving subject, hold the back button down and the camera tracks them perfectly.

3. Case Studies: Not all tracking is the same

The 5D IV has an "AF Configuration Tool" (Tab 1 of the AF menu). Most people ignore it. Don't be most people.

Case 1 (Versatile): Great for general portraits. Sticks to the subject but jumps off if something walks in front.
Case 2 (Ignore obstacles): Crucial for sports or wildlife. If you are shooting through a fence or grass, use this. It ignores the foreground clutter.
Case 4 (Accelerating subjects): For cars on a track or a child running toward you. It reacts faster to speed changes.