FocusStepper app iconFocusStepperBluetooth camera focus bracketing

About the app

What FocusStepper does

FocusStepper is an iPhone app for compatible cameras. It helps you connect over Bluetooth, calibrate lens movement, configure a bracket plan, and run repeatable focus-bracketing sequences from your phone.

Compatibility

What you need

FocusStepper is built for select Sony cameras that support the Bluetooth remote-control workflow the app relies on.

  • An iPhone running a supported iOS version
  • A Sony camera with the required Bluetooth remote control available
  • Bluetooth enabled on both the iPhone and camera

Direct in-hand validation is currently centered on the Sony A7C with a Tamron 28-200 lens. The broader model list below reflects the current target compatibility list and may vary by camera model, firmware version, region, and lens behavior.

The current published model list spans Sony Alpha, ZV, RX, ILX, and Cinema Line bodies.

  • A6100 (ILCE-6100)
  • A6400 (ILCE-6400)
  • A6600 (ILCE-6600)
  • A6700 (ILCE-6700)
  • A7 III (ILCE-7M3)
  • A7 IV (ILCE-7M4)
  • A7C (ILCE-7C)
  • A7C II (ILCE-7CM2)
  • A7CR (ILCE-7CR)
  • A7R III (ILCE-7RM3)
  • A7R IV (ILCE-7RM4)
  • A7R IVA (ILCE-7RM4A)
  • A7R V (ILCE-7RM5)
  • A7S III (ILCE-7SM3)
  • A9 (ILCE-9)
  • A9 II (ILCE-9M2)
  • A9 III (ILCE-9M3)
  • A1 (ILCE-1)
  • A1 II (ILCE-1M2)
  • ZV-E10
  • ZV-E10 II (ZV-E10M2)
  • ZV-E1
  • RX0 II (DSC-RX0M2)
  • RX100 VII (DSC-RX100M7)
  • RX1R III (DSC-RX1RM3)
  • ZV-1
  • ZV-1F
  • ZV-1A
  • ZV-1 II (ZV-1M2)
  • ILX-LR1
  • FX30 (ILME-FX30)
  • FX2 (ILME-FX2)
  • FX3 (ILME-FX3)
  • FX3A (ILME-FX3A)

FocusStepper is not affiliated with, endorsed by, or sponsored by Sony. SONY is a trademark of Sony Group Corporation.

Getting started

Basic workflow

  1. Open FocusStepper and allow Bluetooth access when asked.
  2. Turn on Bluetooth on your compatible camera and connect to it from the app.
  3. Run the focus travel calibration if you have not done that for the lens yet.
  4. Choose your shot count, focus step size, and delays.
  5. Start the bracket and let the app step focus and trigger the shutter.

Subscriptions

Premium help

  • The free tier includes connection, focus checks, calibration, and capped bracket runs.
  • Premium unlocks unlimited runs, saved setups, focus profiles, and session review.
  • Purchases and subscription changes are handled through your Apple account and the App Store.
  • If you already subscribed, use the restore purchases option in the app on a new device.

Troubleshooting

Common issues

  • If your camera does not appear, verify that Bluetooth is enabled and that the camera supports the required remote-control flow.
  • If focus movement feels off, recalibrate the lens in the app before saving a setup.
  • If Premium does not appear active, restore purchases and confirm you are signed in with the correct Apple ID.

Contact

Email support

There is no contact form on this site. For support, email Zzpelle@outlook.com.