Grinder comparison
1Zpresso J-Ultra vs Fellow Opus
The 1Zpresso J-Ultra makes the smaller adjustments (2.5 µm a step against 23.3 µm), so it gives finer control between settings. Both reach the same grind sizes, just at different numbers.
Side by side
| 1Zpresso J-Ultra | Fellow Opus | |
|---|---|---|
| Setting format | Click | Number |
| Finer direction | Lower numbers | Lower numbers |
| Smallest adjustment | 2.5 µm | 23.3 µm |
| Steps from espresso to French press | 264 | 28 |
| Espresso setting~250 µm | 1.0.2 | 1.25 |
| Moka pot setting~350 µm | 1.4.2 | 2.25 |
| AeroPress setting~450 µm | 1.8.3 | 3.25 |
| V60 setting~560 µm | 2.2.8 | 4.5 |
| Chemex setting~700 µm | 2.8.5 | 6 |
| French press setting~900 µm | 3.6.6 | 8.25 |
| Kalita Wave setting~600 µm | 2.4.4 | 5 |
| Cold brew setting~1100 µm | 4.4.7 | 10.25 |
| Siphon setting~650 µm | 2.6.4 | 5.5 |
This compares how the grinders adjust, not build quality, burr type or price. Settings come from one shared particle-size scale fitted from the Honest Coffee Guide and are a starting point.
Convert between them
- 1Zpresso J-Ultra to Fellow Opus
- Fellow Opus to 1Zpresso J-Ultra
- 1Zpresso J-Ultra settings
- Fellow Opus settings
Questions
Which grinder has finer adjustment, the 1Zpresso J-Ultra or the Fellow Opus?
The 1Zpresso J-Ultra makes the smaller adjustments (2.5 µm a step against 23.3 µm), so it gives finer control between settings. Both reach the same grind sizes, just at different numbers.
Can I use the same setting on both?
No. A V60 grind is about 2.2.8 on the 1Zpresso J-Ultra and 4.5 on the Fellow Opus.