Product Overview

The focus controller is an essential tool for controlling lens focus in film production. During dynamic video shooting, it enables real-time adjustments to depth of field and focus shifts, adding narrative depth and visual (impact) to your footage. The Smallrig 4296B supports frequency band switching, travel calibration, A/B marking, and other functions, making it suitable for various professional filmmaking scenarios. It is a smart device that combines manual and motorized control.

Basic Operation Guide

Frequency Band Setting

• Objective: Ensure synchronization between the handwheel and motor signals.
• Steps:
  • Double-click the signal button on the handwheel or the up key on the motor to switch to the matching frequency band (e.g., 27MHz).
  • Note: If the handwheel’s green light and the motor’s red light indicate different frequencies, switch them immediately to the same band.

Travel Calibration (Auto/Manual)

• Auto Calibration:
  • Long-press the CAL button on the handwheel for over 2 seconds until the motor starts moving. The auto-calibration process begins automatically. Stop when the motor finishes calibrating.
• Manual Calibration:
  1. Long-press the CAL button until the motor starts turning, then click CAL once to enter manual mode. The A lamp blinks, indicating the motor has stopped.
  2. Manually rotate the lens to the farthest point of travel. Click CAL again; the A lamp stays on while the B lamp blinks.
  3. Rotate the lens back to the starting point and click CAL once more. Wait until both lamps turn off to complete calibration.

A/B Marking Function

• Purpose: Mark specific focus positions for quick recall.
• Steps:
  1. Rotate the handwheel to the starting point of your desired travel range and click the A/B button. The A lamp lights up, confirming the A mark is set.
  2. Move to the endpoint and click A/B again. The B lamp lights up, completing the A/B marks.