Which to buy · Every setting
DF64 DF64 V2 vs Fellow Opus
Conical against flat — the Opus's scale curves where the other runs straight. The Opus is numbered 1–11; the DF64 V2 is numbered 0–90.
Which to buy
Choose the
DF64 V2 if you…
- want 64 mm flat burrs — Turin says Mazzer Super Jolly or Red Speed burrs fit too
- want stepless adjustment by collar
- single-dose — it has a 50 g bellows hopper and a 58 mm dosing cup
Choose the
Opus if you…
- want fixed steps you can return to exactly — 41 on the dial, plus a micro-adjust ring
- want a timed auto-stop at 30, 60, 90 or 120 seconds
- grind more than one dose at a time — it holds 110 g
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Neither is sold new. Fellow now sells the Opus 2 in place of the original; the settings on this page are for the original. Turin no longer sells the first-generation DF64; it now sells the DF64 Gen 2 and lists Gen 1 only for parts.
Sources: Fellow — Opus (archived) · Fellow — Opus gear guide · Turin — DF64 (archived, Aug 2022) · Turin — catalogue
| DF64 V2 | Opus | |
|---|---|---|
| Brand | DF64 | Fellow |
| Scale | Numbered dial | Numbered dial |
| Dial range | 0 – 90 | 1 – 11 |
| Burrs | Flat | Conical |
| Espresso → filter | 55.5 numbers | 5.7 numbers |
| Filter → coarse | 22.2 numbers | 3.9 numbers |
The same number means different things
Both grinders use a numbered dial, which makes it tempting to copy a number straight across. Setting 6 sits at grind index 0 on the DF64 V2 but 34.2 on the Opus — far enough apart to change the cup.
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.
| DF64 V2 | Opus |
|---|---|
| 12.2 | 1.2 |
| 20.8 | 1.2 |
| 30.4 | 2 |
| 43.7 | 3.2 |
| 57 | 5.3 |
| 68 | 7.1 |
| 69.2 | 8 |
| 70.5 | 8.2 |
| 71.8 | 8.3 |
| 75.2 | 9.1 |
| 80.1 | 9.3 |
| 85 | 10.2 |
| 89.9 | 11 |
| Opus | DF64 V2 |
|---|---|
| 1.2 | 12.2 |
| 2 | 30.4 |
| 3.2 | 43.7 |
| 5.3 | 57 |
| 7.1 | 68 |
| 8 | 69.2 |
| 8.2 | 70.5 |
| 8.3 | 71.8 |
| 9.1 | 75.2 |
| 9.3 | 80.1 |
| 10.2 | 85 |
| 11 | 89.9 |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | DF64 V2 | Opus |
|---|---|---|
| Espresso | 17.4 | 1.2 |
| Moka pot | 27.7 | 1.3 |
| AeroPress (short steep) | 35 | 3.2 |
| Pour over — V60 / cone | 64.5 | 6.3 |
| Siphon | 68 | 7.2 |
| Pour over — flat bottom | 68.5 | 7.3 |
| Steep and release — Clever / Switch | 68.9 | 8 |
| Drip / batch brew | 69.2 | 8 |
| Cupping | 69.5 | 8 |
| Chemex | 70.5 | 8.2 |
| French press | 73.5 | 9 |
| Cold brew | 82.9 | 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.
DF64 DF64 V2
Fellow Opus
Dialing in the DF64 V2
A single-dose flat-burr grinder that became popular by putting commercial-size burrs at a domestic price. The burr set fitted matters more to grind character than the dial does, and swapping burrs is common enough that published numbers vary between owners.
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.