Fellow Opus grind settings.
Fellow's all-methods conical grinder — the Ode's stablemate, but with espresso genuinely inside the range.
The chart
Starting points, not targets. Each number carries a ± 0.5-dial step band because that is the honest resolution of this dial — land inside the band, then let taste move you.
| Brew method | Opus dial |
|---|---|
| Espresso anchor | 2 ± 0.5 |
| Moka pot | 3 ± 0.5 |
| AeroPress (short, fine) | 3.5 ± 0.5 |
| V60 / pour-over | 4.5 ± 0.5 |
| Kalita Wave | 5 ± 0.5 |
| Chemex / batch drip | 6 ± 0.5 |
| Clever / switch immersion | 7 ± 0.5 |
| French press anchor | 9 ± 0.5 |
| Cold brew | 10 ± 0.5 |
One dial step on this grinder moves the grind by about 0.93 of a point on the 1–10 universal scale — so roughly 1 dial step is the smallest change worth making between brews.
A chart gets you a starting number and then stops. Coffee Aeye quotes every recipe in Opus dial to begin with — and when you rate the brew, it tells you which way to move and how many, on this dial.
€4.29 on Google PlayWhere these numbers come from
Two anchors, and interpolation between them. Espresso and French press are the only two bands that manufacturers and community charts actually document with any consistency, so those are the fixed points: espresso at 2 and French press at 9. Everything between is a straight line drawn through them, quantised to the dial step this dial actually resolves.
Absolute accuracy is not possible and this page will not claim it. Burr wear, per-unit zero points and assembly tolerances all shift where a number lands. What the two-anchor method gives you is the right shape — correct spacing between methods, correct direction of travel — which is what you need to dial in efficiently. The rest comes from calibration.
How this grinder works
An outer collar numbered 1 to 11 with half-step graduations, plus a micro-adjust ring inside the hopper. This chart addresses the outer collar only; the micro-adjust is a fine trim on top of it, and folding it into a published chart would create precision that does not survive a hopper removal.
Calibrating the chart to your own Opus
If the chart runs consistently coarse or fine for you, do not nudge every row. Re-anchor it:
- Find your espresso mark — the dial step where a 1:2 shot in about 28 seconds actually happens on your machine. If you do not pull espresso, use the finest point where a moka pot does not choke.
- Find your French press mark — coarse enough that a four-minute steep is clean rather than muddy, and the plunger does not fight you.
- Enter both in Coffee Aeye. Replacing the two anchors corrects the zero point and the slope at once, and every method in between re-derives from your own two numbers.
This matters more on some grinders than others — it matters most anywhere the dial is stepless or the zero is set by hand.
Known quirks of the Opus
Same dial numbers as the Ode. Completely different grinder.
40 mm conical against the Ode's 64 mm flat. The dials look identical and the results are not remotely comparable. Never carry a setting between them.
Espresso is real here, at the very bottom.
Around setting 2 with the micro-adjust engaged. Tight, but genuinely usable — the Ode's single biggest gap, closed.
The micro-adjust resets when you pull the hopper.
If you clean it, re-set the inner ring before trusting your old numbers.
Moving the dial when a brew tastes wrong
The chart gets you into the right neighbourhood. Taste gets you the rest of the way, and the rule is the same on every grinder here:
| What you taste | What it means | Move |
|---|---|---|
| Sour, sharp, thin, empty finish | Under-extracted | Finer |
| Bitter, drying, harsh, ashy | Over-extracted | Coarser |
| Balanced but weak | Ratio, not grind | Hold |
| Balanced but overwhelming | Ratio, not grind | Hold |
On this dial, 1–2 dial steps is one meaningful step. Change one thing per brew. The full method is in the V60 dial-in guide.
Coffee Aeye holds this chart for all 18 supported grinders and closes the loop on it. Rate a brew and it converts the fault you tasted into a concrete move — how many dial on your Opus, in your own dial numbers, not a vague "grind finer". Calibrate your two anchors once and every recipe in the app re-derives to your unit. Get it on Google Play — €4.29, one-time.
Convert a setting to another grinder
Settings do not transfer between grinders — click sizes, burr geometry and zero points all differ. The grinder converter maps a Opus setting onto any of the other 17 through the same universal scale this chart is built on.