RingThing — Focus Ring Maker

RingThing turns focus ring labels into something you actually want to put on your kit. Built for camera assistants working with ARRI Hi-5, ARRI WCU-4 or Tilta Nucleus M2 hand units (with others in development), it lets you design, preview and export beautifully laid out focus, iris and zoom ring labels straight from your iPhone.

Open a .rng file exported from a Hi-5, or import ARRI, cmotion or Tilta LDA calibration tables for the lenses you're using — and RingThing renders a ring label that matches the engraved scales, mark for mark.

DESIGN
• Carefully drawn typography for imperial and metric focus scales, including superscript fractions and decimals.
• Interpolated minor marks with adjustable density so dense ends of the scale stay readable.
• Theme system with presets you can override; build and save your own themes, or import a friend's with a QR code.
• Live preview with rotation, contrast cues and a print-accurate layout.

SOURCES
• Open .rng files exported from an ARRI Hi-5.
• Import ARRI, cmotion and Tilta LDA (.tab, .cml, .tl) lens calibration tables — by file, by scanning a QR code, or from a photo.
• Choose which scale to render from a multi-axis LDA: focus, iris or zoom.
• Convert ARRI LDAs to Tilta Nucleus M2 LDA files (Pro)
• Files restore on cold launch, so the lens you were just working on is right there when you re-open the app.

EXPORT & SHARE
• Print-ready PDFs and PNGs sized for A4 stock.
• Crisp SVGs for design and cutting tools (Pro).
• Themed story-image exports for sharing your work.
• Optional contrasting border on print exports for cleaner trimming.
• Share imported LDAs with the rest of your camera department.

3D-PRINTABLE APPLICATION JIGS
• Share an STL for a left- or right-handed Hi-5, WCU-4 or Tilta Nucleus M jig and print one on any FDM or resin printer.
• The jigs hold the labels squarely against the rings while you press down — no more wonky applications.

PRO
A one-time, no-subscription Pro purchase unlocks SVG export, .rng import, ARRI-to-Tilta LDA conversion, Data Matrix barcodes, persistent theme and LDA libraries, and saved custom themes. Free version users can take LDA imports for a test drive each session before deciding.

Feedback and feature requests are very welcome via the Instagram link inside the app.