Gear Dossier · Grinders · No 02 of 8

FellowOpus Conical Burr Grinder.

The verdict in one line: Fellow names all four of our brew methods directly on the Opus's spec sheet, but the 110g hopper and catch bin undersize our cold brew guide's full one liter batch, and the timer doses by seconds, not the grams every guide on this site measures by.

41+ adjustable settings
grind settings
Cold brew coarse to espresso fine, under 200 microns
grind range
110g each
bean hopper and catch bin
Espresso, pour-over, electric coffee makers, French press, AeroPress, cold brew
brew methods listed
6/8
recipe checks
Grounds catch bin: 110gAuto-stop cycles: 30, 60, 90 second and 2 minute timed cyclesPower: 120 VAC, 60 Hz

The fit meter

Not a score. A count.

Every requirement below comes straight out of our own brew guides. Each segment is one requirement; hover or focus any segment to see the exact check it stands for. Lit means the published spec meets the recipe. We do not light what we cannot cite.

Espresso guide specifies a fine grind for a 1:2, 25 to 35 second shotPour-over guide specifies a medium grindFrench press guide specifies a medium-coarse grindCold brew guide specifies a coarse grindEvery guide on this site doses by weight in grams, not by timeCold brew guide's full one liter batch requires 125g of coffeeEspresso guide's single dose is small and precise, 18 to 19gFrench press guide's two-cup recipe doses 45g of coffee in one load

6 of 8 checks pass · every unlit segment is stated, not hidden

Every check, shown working

The recipe interrogates the spec.

Requirement, from our guide
Our number
Manufacturer spec
Fit
Espresso guide specifies a fine grind for a 1:2, 25 to 35 second shot
Fine, 18 to 19g in, 36 to 38g out, 25-35s
Grind range runs to espresso fine, stated as under 200 microns, with espresso named directly among the Opus's supported brew methodswholelattelove.com
Pour-over guide specifies a medium grind
Medium, 1:16-1:17 ratio
Pour-over is named directly among the Opus's supported brew methods, alongside electric coffee makers, on the same 41+ setting dialthecaptainscoffee.com
French press guide specifies a medium-coarse grind
Medium-coarse, 1:14-1:18 ratio
French press is named directly among the Opus's supported brew methodsthecaptainscoffee.com
Cold brew guide specifies a coarse grind
Coarse, 1:8 ratio
Grind range is stated as running to cold brew coarse at the opposite end of the same dial from espresso fine, and cold brew is named directly among supported brew methodswholelattelove.com
Every guide on this site doses by weight in grams, not by time
18-19g espresso; 15g per cup pour-over; 22.5g per cup French press; 125g per litre cold brew, all weighed
Auto-stop is a timed feature: 30, 60, 90 second and 2 minute grind cycles, not a by-weight dosing systemfellowproducts.com
Cold brew guide's full one liter batch requires 125g of coffee
125g coffee per 1000g (1 litre) water
Bean hopper and grounds catch bin are both listed at 110g capacitywholelattelove.com
Espresso guide's single dose is small and precise, 18 to 19g
18 to 19g in, weighed
Listed as built for single-dosing with low grind retentionthecaptainscoffee.com
French press guide's two-cup recipe doses 45g of coffee in one load
45g coffee, two-cup batch
110g bean hopper and catch bin capacity clears a 45g dose in a single loadwholelattelove.com

Plain speech

Buy it, or don't.

For you if

  • You brew with our espresso, pour-over, French press, or cold brew guide and want one grinder that names all four methods directly on its own spec sheet.
  • You already weigh your dose on a separate scale: the Opus's low grind retention and single-dosing design suit weighing before or after the grind, not trusting the timer to hit a gram figure.
  • Your cold brew batches run under 110g of coffee per grind cycle, for example a half liter batch at our guide's 1:8 ratio, which clears the hopper and catch bin in one load.

Not for you if

  • You want to grind a full one liter cold brew batch, 125g on our guide's 1:8 ratio, in a single load: that is over the Opus's listed 110g hopper and catch bin capacity.
  • You want the grinder itself to dose by weight: the auto-stop runs 30, 60, 90 second and 2 minute timed cycles, not grams, so a scale still sits between this grinder and every guide on this site.
  • You want a dedicated espresso-only micro range: the Opus covers fine espresso through coarse cold brew on one 41+ setting dial rather than a separate espresso-tuned range.

Where to buy

Opus Conical Burr Grinder · Fellow

Fits the grind windows in 4 of our brew guides.

Buy on Amazon→

Transparency: the buttons above are affiliate links; if you buy through them we may earn a commission at no cost to you. As an Amazon Associate we earn from qualifying purchases. Fit notes come from manufacturer specifications read against our brew guides, not hands-on trials.

Questions, answered plainly

FAQ.

Fellow Opus against our numbers

Fellow’s Opus is a single conical-burr grinder built to cover fine espresso through coarse cold brew on one dial. Fellow’s own gear guide for the product, standing in as the manufacturer source after the dedicated Opus product page returned 404 at fetch time this run, states 41+ adjustable settings across an outer coarse ring and a blue inner micro-adjustment ring. Captain’s Coffee’s listing names all four methods our guides cover directly: espresso, pour-over, French press and cold brew each appear on its supported brew methods list.

Capacity and dosing are where the numbers get specific. Whole Latte Love lists both the bean hopper and the grounds catch bin at 110g. Our cold brew guide’s own math runs 125g of coffee per litre of water at a 1:8 ratio, more than either compartment holds in a single load. And the Opus’s auto-stop is a clock, not a scale: Fellow’s own gear guide lists grind cycles timed at 30, 60, 90 seconds and 2 minutes. Every dose across our four guides, from espresso’s 18 to 19g to cold brew’s 125g per litre, is defined in grams, so a separate scale still sits between this grinder and any recipe on this site.

One published number is worth flagging rather than quietly picking a side on. Captain’s Coffee and the Amazon listing’s title both state a 40mm burr, while Whole Latte Love’s listing states 41mm. This dossier uses the 40mm figure, backed by two of the three sources fetched this run, and notes the disagreement here instead of blending the two numbers.

FAQ

Does the Opus grind fine enough for espresso?

Yes. Whole Latte Love’s spec listing states the grind range runs from “cold brew coarse to espresso fine (under 200 microns),” and espresso is named directly among the Opus’s supported brew methods on Captain’s Coffee’s listing.

How much coffee can I load into the hopper at once?

110g, per Whole Latte Love’s listing, and the grounds catch bin is rated at the same 110g. Our cold brew guide’s full one liter batch calls for 125g of coffee, over that figure, so a full-size batch needs either a second grinding cycle or a smaller batch scaled down from the guide’s own math.

Does the Opus dose by weight?

No. Fellow’s own gear guide lists the auto-stop as timed cycles, 30, 60, 90 seconds and 2 minutes, not a weight-based cutoff. Every guide on this site, from espresso to cold brew, measures dose in grams, so pairing the Opus with a separate scale is not an optional extra, it is the same baseline every grinder on this shelf needs.

What’s in the box?

Per Fellow’s own gear guide: a safety manual, a Get to Know You guide, the grinder unit, the load bin lid, a catch cup, and a catch cup insert for portafilter dosing.

Why do the burr size figures disagree between listings?

Captain’s Coffee’s listing and the Amazon listing’s title both state a 40mm burr; Whole Latte Love’s listing states 41mm. Fellow’s own gear guide page fetched this run does not state a burr diameter at all. This dossier uses 40mm, the figure backed by two of the three sources checked this run, and states the discrepancy plainly rather than picking silently.

Sources & data