Fellow Opus
- Grind range
- 0–1250 µm
- Per click
- ≈22.68 µm
- Adjustment
- 41 clicks
- Brew methods
- 19
At its coarsest it reaches about 1250 µm, so Cold Brew sits partly beyond its range.
swipe the chart to see the whole scale
About the Fellow Opus
The Fellow Opus is an electric grinder with 40 mm conical burrs and stepped adjustment. At its coarsest it reaches about 1250 µm, so Cold Brew sits partly beyond its range. Each click moves the grind by roughly 22.68 µm.
What we found on this machine
Checked against
Fellow's Opus "Get to Know You Guide", page 5. Read September 07, 2026.
Fellow's guide prints no ranges. Page 5 is a numbered axis with a labelled bracket drawn over it per method, so every figure here was read off that drawing. Each bracket resolved to a whole number, which is the check that it was read right rather than nearly right.
The axis is in numbers and the dial is in settings, and Fellow states both on the same page: it runs "to coarse (11)" with "41 settings in all". Eleven numbers over ten intervals of four gives exactly 41, so each number is four settings — arithmetic the maker's own two figures determine rather than a curve fitted to them.
Cupping and Electric Coffee Maker share one bracket here, from 7 to 9, with two leader lines dropping into a single rule — worth checking closely, because a merged pair and a single band look identical at a glance. Only Electric Coffee Maker is mapped, to drip; cupping is left alone, since this site does not chart it and mis-labelling exactly that band once cost the Ode Gen 2 its curve.
"Prismo" is a pressure attachment rather than a brew method, and is deliberately not mapped to espresso.
Methods the Fellow Opus covers
6 of these 19 settings are Fellow's own published figures. The rest are worked out from this grinder's range. Start there and adjust to taste.
- Espresso 1–5 clicks · roughly 200–300 µm Fine From the maker
- Moka Pot 6–11 clicks · roughly 300–400 µm Fine
- Pour Over (V60) 17–33 clicks · roughly 450–650 µm Medium-fine From the maker
- Chemex 29–31 clicks · roughly 700–900 µm Medium-coarse
- AeroPress 5–17 clicks · roughly 400–700 µm Medium-fine From the maker
- French Press 29–37 clicks · roughly 900–1200 µm Coarse From the maker
- Cold Brew 37–41 clicks · roughly 1000–1400 µm Extra coarse From the maker
- Drip / Batch 25–33 clicks · roughly 600–800 µm Medium From the maker
- Siphon 16–29 clicks · roughly 500–700 µm Medium
- Cold Drip 29–31 clicks · roughly 700–900 µm Medium-coarse
- Percolator 29–37 clicks · roughly 900–1200 µm Coarse
- Cuccumella 16–29 clicks · roughly 500–700 µm Medium
- Kaapi Filter 17–33 clicks · roughly 450–650 µm Medium-fine
- Jebena 16–29 clicks · roughly 500–700 µm Medium
- Chorreador 17–33 clicks · roughly 450–650 µm Medium-fine
- Dallah 1–11 clicks · roughly 200–400 µm Fine
- Cafe de Olla 30–32 clicks · roughly 800–1000 µm Medium-coarse
- Prestina 16–29 clicks · roughly 500–700 µm Medium
- Vietnamese Phin 30–32 clicks · roughly 800–1000 µm Medium-coarse
Fellow Opus — frequently asked questions
Is the Fellow Opus a manual or electric grinder?
The Fellow Opus is an electric grinder with 40 mm conical burrs.
How much does each click change the grind on the Fellow Opus?
Each click on the Fellow Opus changes the grind by about 22.68 microns, so you can dial in small steps.
What grind sizes can the Fellow Opus produce?
The Fellow Opus grinds from about 0 to 1250 µm, covering 19 of the brew methods we chart.
Can I copy grind settings from another grinder to the Fellow Opus?
Not directly — every grinder's scale is arbitrary, so a number that works on one model won't match the Fellow Opus. Match the micron range instead, using the chart above.