Fellow Opus Grinder Review 2026: Six Methods

• 40mm conical burrs: Conical burrs are forgiving and well suited to the coarser range, which is where the Opus is strongest. Filter and French press brewers benefit most. The trade-off is less headroom at the finest settings, which matters for ultra-light espresso roasts.
• Stepped adjustment: Numbered settings make it easy to write down a recipe and return to it. Beginners benefit. The trade-off is that you cannot always land exactly between two steps, so espresso users sometimes change dose instead of grind.
• Anti-static design: Less scatter means a cleaner counter and a cleaner portafilter or dripper. This helps anyone who dislikes wiping up grounds. It does not remove static entirely on humid days with light roasts.
• 100g hopper: You can single-dose or fill the hopper for a few days. Loading only the dose you need is a sensible habit.
• Hex-key burr access: The burrs are not tool-free, which is a small annoyance during deep cleaning.

The Opus uses 40mm conical burrs with a stepped dial that covers espresso through cold brew. A cone-shaped inner burr turns against a fixed ring, which tends to give a wider mix of grind sizes than flat burrs. In a cup that usually means a fuller, rounder body. Our cold brew ratio calculator works out concentrate or ready-to-drink batches.

The design includes anti-static handling to reduce cling, a feature that matters because static causes grounds to fly and clump. Stepped adjustment is simpler to learn, and you can note your favorite number for each brewing method.

What it means in practice: a single grinder that handles drip, pour-over coffee, French press and light-duty espresso. The trade-off is that espresso on fixed steps is less precise than on a stepless grinder.

Who this mechanism suits: One grinder for a French press in the morning and a latte-style shot at night is the Opus pitch. Serious espresso fans will eventually want finer adjustment, and the grinder is best treated as a flexible mid-range step. For the dose, use the French press ratio calculator.

Common issues are static, between-step settings and burr cleaning.

• Static: an RDT mist and a wiped chute still help, even with anti-static design.
• Between-step espresso: if two steps straddle the target, adjust dose or tamp. See a shot that runs too fast or too slow.
• Clumps: stir the dose with WDT. A puck screen can reduce channeling.
• Cleaning: remove the upper burr and brush away oils on a schedule.
• Not sure where to start on the dial: our Opus settings by brew method gives starting points to adjust from.
• Muddy filter cups: compare your setting with the coffee grind size chart.
• Needing finer control: consider Baratza Encore ESP for micro steps, or a flat burr grinder for light roasts.

See how to choose a burr grinder for more advice.

• Versus the Baratza Encore ESP: Read the Baratza Encore ESP review if espresso is more than half of your brewing. The Encore ESP adds finer adjustment and a stronger repair culture, while the Opus wins on filter results and mess.
• Versus the Baratza Virtuoso+: The Baratza Virtuoso+ review covers a filter-focused alternative with an easier path to parts and service.
• Versus the Fellow Ode Gen 2: The Fellow Ode Gen 2 review covers Fellow's filter-only flat-burr grinder, which suits buyers who never make espresso.
• Versus a dedicated espresso grinder: For serious espresso, see the Eureka Mignon Specialita review or the DF64 Gen 2 review. You can also compare everything in our best coffee grinders guide.