RingThing — Focus Ring Maker

Now supporting Tilta Nucleus M rings and the Nucleus M2 hand unit — design, preview and print focus labels for your Nucleus M2, straight from your iPhone.

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.