EOS C400

The Canon EOS C400 is a powerful, versatile digital cinema camera designed to bridge the gap between high-end production and agile, run-and-gun workflows. Positioned as a robust tool for professional cinematographers, it offers a full-frame sensor and advanced internal recording capabilities that make it a formidable competitor in the cinema market. Its modular design allows for a wide range of configurations, from a stripped-down handheld setup to a fully rigged production build, making it equally at home on a documentary shoot or a narrative set.

What sets the C400 apart is its sophisticated workflow integration, supporting 6K/4.3K RAW recording internally to CFexpress cards while simultaneously capturing 2K proxy files to SD cards. This dual-slot architecture, combined with advanced features like the ACES workflow support and in-camera lens correction, provides a streamlined post-production path. The camera also boasts extensive connectivity, including SDI, HDMI, and Ethernet terminals, ensuring it fits seamlessly into professional live and studio environments.

This camera is an excellent choice for filmmakers who need high-quality, reliable performance across diverse production types. Whether you are shooting high-end commercials, feature films, or fast-paced documentary content, the C400 provides the necessary tools to capture high-fidelity footage with a flexible, efficient workflow.

Narrative Filmmaking

Use the RAW recording format for maximum dynamic range and color grading flexibility. Set the base ISO to match your lighting conditions (e.g., Base ISO 800 for normal lighting) to optimize the signal-to-noise ratio. Use a 180-degree shutter angle for natural motion blur.

Documentary / Run-and-Gun

Record in XF-AVC or XF-HEVC S for a balance of high quality and manageable file sizes. Enable Continuous AF with Subject Detection to ensure critical focus during unpredictable action. Use the built-in ND filters to maintain your desired aperture in changing light conditions without needing external filters.

Interview & Talking Head

Set the camera to a standard picture profile like [Canon 709] for a ready-to-use look, or use Canon Log 3 if you plan to grade in post. Utilize the INPUT 1/INPUT 2 terminals for professional XLR audio, and set the audio level to manual to ensure consistent, clean sound levels.

Slow Motion

Use the [Slow & Fast Motion] recording mode. Note that sound is not recorded in this mode. Ensure your shooting frame rate is set higher than your playback frame rate (e.g., 60fps shooting for 24fps playback) to achieve the desired slow-motion effect.

Camera will not turn on or turns off by itself

What's happening: The camera fails to power up or shuts down unexpectedly. Why: This is typically caused by a depleted battery pack or a poor connection. Fix: Replace or charge the battery pack, or remove and reattach it to ensure a secure connection. Prevention: Regularly check the battery level on the status screen and ensure the battery is fully charged before important shoots.

Cannot charge the battery pack

What's happening: The battery charger does not charge the battery. Why: The battery temperature may be outside the safe charging range (0-40°C). Fix: Allow the battery to reach room temperature before attempting to charge it again. Prevention: Store and charge batteries in a temperature-controlled environment.

Pressing the REC button will not start recording

What's happening: The camera is in standby but won't begin recording. Why: The card may be full, the maximum clip limit (999 clips) may have been reached, or the REC button may be disabled in the menu. Fix: Delete unnecessary clips, initialize the card, or check the [Camera REC Button] settings in the [System Setup] menu. Prevention: Monitor card space and clip counts regularly during production.

The camera will not focus

What's happening: Autofocus is failing to lock onto the subject. Why: The subject may be difficult for the AF system (e.g., low contrast, repetitive patterns), or the lens may be dirty. Fix: Switch to manual focus and use the focus assistance functions like the focus guide or peaking. Prevention: Keep lens contacts and glass clean, and use manual focus for challenging subjects.