How to Configure Focus Monitoring in Blackmagic Camera on iPhone

Configure colored focus-assist lines and guide opacity in Blackmagic Camera to prepare a repeatable product-shot monitoring setup.

Step 1

Open Blackmagic Camera

Before you begin: Blackmagic Camera for iOS. Screenshots: version 3.5.20 on iPhone 14 Pro Max. Start from your preferred baseline; changing these settings affects subsequent recordings.

Open Blackmagic Camera on your iPhone. Start in the Camera view. This walkthrough uses version 3.5.20 on an iPhone 14 Pro Max; available formats may differ on other devices.

Step 2

Open camera settings

Tap Settings at the bottom. The recording, camera, audio and monitoring settings appear in this scrollable list.

Step 3

Open Focus Assist

In Settings, tap Focus Assist.

Step 4

Set Focus Assist to Colored Lines

Select Colored Lines as the focus-assist display style. This is a monitoring aid, not an effect added to your video.

Step 5

Open Focus Assist Color

In Settings, tap Focus Assist Color.

Step 6

Set Focus Assist Color to Green

Choose green to distinguish focus-assist markings from other overlays. Pick a contrasting color for your subject.

Step 7

Open Guides Opacity

In Settings, tap Guides Opacity.

Step 8

Set Guides Opacity to 50%

Set guide opacity to 50% so composition guides are easier to see when enabled. These settings configure the overlays; enable the relevant overlay in the camera view when composing.

Step 9

Check the camera before recording

Return to Camera and check your framing, lighting and sound before recording. The screenshots demonstrate settings; they do not include a recorded clip.

Reference

By ProgramGuru

Published: 2026-10-14

Updated: 2026-10-14

Instructions reviewed against Apple documentation on 2026-10-14.

Blackmagic Camera: technical specifications