Which to buy · Every setting
Eureka Mignon Specialita vs Fellow Opus
Conical against flat — the Opus's scale curves where the other runs straight. The Opus is numbered 1–11; the Mignon Specialita turns 0–24 rotations.
Which to buy
Choose the
Mignon Specialita if you…
- want stepless adjustment
- want a 300 g hopper and two timed doses
- want a hands-free fork that holds the portafilter
Choose the
Opus if you…
- want fixed steps you can return to — 41 on the dial, plus a micro-adjust ring
- want 40 mm conical burrs
- want a timed auto-stop at 30, 60, 90 or 120 seconds
Shop links are affiliate links: BrewMark earns a commission if you buy through one, at no extra cost to you. The verdicts were written without regard to it.
Fellow now sells the Opus 2 in place of the original. The settings on this page are for the original Opus.
Sources: Fellow — Opus (archived) · Fellow — Opus gear guide · Fellow — Opus page today · Eureka — Mignon Specialità
| Mignon Specialita | Opus | |
|---|---|---|
| Brand | Eureka | Fellow |
| Scale | Rotations | Numbered dial |
| Dial range | 0.0 rotations – 24.0 rotations | 1 – 11 |
| Burrs | Flat | Conical |
| Espresso → filter | 6.5 rotations | 5.7 numbers |
| Filter → coarse | 7 rotations | 3.9 numbers |
Converting a setting
If a recipe quotes a setting for one of these grinders, read across for the equivalent on the other. Rows are spaced evenly by grind size, not by dial number — on a conical burr those are not the same thing.
| Mignon Specialita | Opus |
|---|---|
| 1.5 | 1.2 |
| 3 | 1.2 |
| 4 | 2 |
| 5.5 | 3.2 |
| 1+1 | 5.3 |
| 1+2 | 7.1 |
| 1+3 | 8 |
| 1+4 | 8.2 |
| 1+5 | 8.3 |
| 2+0 | 9.1 |
| 2+1 | 9.3 |
| 2+2 | 10.2 |
| 2+3 | 11 |
| Opus | Mignon Specialita |
|---|---|
| 1.2 | 1.5 |
| 2 | 4 |
| 3.2 | 5.5 |
| 5.3 | 1+1 |
| 7.1 | 1+2 |
| 8 | 1+3 |
| 8.2 | 1+4 |
| 8.3 | 1+5 |
| 9.1 | 2+0 |
| 9.3 | 2+1 |
| 10.2 | 2+2 |
| 11 | 2+3 |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | Mignon Specialita | Opus |
|---|---|---|
| Espresso | 2.5 | 1.2 |
| Moka pot | 4 | 1.3 |
| AeroPress (short steep) | 5.5 | 3.2 |
| Pour over — V60 / cone | 1+1.5 | 6.3 |
| Siphon | 1+2 | 7.2 |
| Pour over — flat bottom | 1+2.5 | 7.3 |
| Steep and release — Clever / Switch | 1+3 | 8 |
| Drip / batch brew | 1+3 | 8 |
| Cupping | 1+3.5 | 8 |
| Chemex | 1+4 | 8.2 |
| French press | 1+5.5 | 9 |
| Cold brew | 2+1.5 | 10 |
The shape of each dial
Where the connectors bunch, that grinder’s dial is compressed and single steps count for more. Comparing the two shapes tells you which gives finer control, and where.
Eureka Mignon Specialita
Fellow Opus
Dialing in the Mignon Specialita
A stepless espresso grinder first, everything else second. The micrometric adjustment means small movements do real work at the fine end, and the settings below should be read as starting positions rather than detents. It will grind for filter and does it competently, but you are working at the far edge of a dial designed for a different job.
Dialing in the Opus
Marketed as all-purpose, and it genuinely does cover more range than the Ode, but the espresso end is workable rather than good — expect to chase it. Where it earns its place is the coarse end: cold brew and French press come out notably even. If you bought the Opus mainly for espresso, dial it as a brew grinder first and judge it there.