☰

By Ked · June 2026

The Leica Tri-Elmar Lenses

June 2026

Leica's Tri-Elmar lenses are one of the most original optical designs in the M-mount catalog and one of the least understood by buyers who haven't owned one. They look like zooms. They aren't zooms. The Tri-Elmar's focal-length ring doesn't move smoothly through a range. It clicks into three discrete positions, each corresponding to a separately optimized focal length, with no intermediate stops. The result is something closer to "three primes in one barrel" than to any conventional zoom design.

Two Tri-Elmars exist. The Tri-Elmar-M 28-35-50mm f/4 ASPH (often called the "MATE," for M Asph Tri-Elmar) covers the classic Leica trinity of wide-normal focal lengths, while the Tri-Elmar-M 16-18-21mm f/4 ASPH (the "WATE," for Wide Angle Tri-Elmar) covers the ultra-wide range. Both are constant-f/4, both are click-stop three-position designs, and both occupy specific working niches that no other Leica lens fills as cleanly.

This post walks both Tri-Elmars in detail (design, generations, optical character, and who they're right for) with current used pricing as of June 2026.

Why Three Focal Lengths in One Lens

The case for a Tri-Elmar is a working one. A traveling photographer who'd normally carry a 28mm and a 35mm and a 50mm has three lenses in the bag, three changes per shooting session, and three lenses to keep track of. A photographer carrying a single Tri-Elmar 28-35-50 has one lens that delivers all three focal lengths with a single twist of a ring: no swap, no exposed sensor between changes, no second lens to drop or lose. The same logic applies to the wide-angle Tri-Elmar for architecture and landscape shooters who'd otherwise need a 16, an 18, and a 21.

The reason this works at all is that Leica chose not to design a true zoom. A continuous zoom would have required moving elements, compromised aperture (most zoom designs lose at least a stop across their range), and additional optical complexity. The click-stop Tri-Elmar approach lets Leica optimize each of the three positions essentially independently. Each focal length gets its own optical configuration when the ring clicks into place, with constant f/4 across all three. The optical performance is closer to prime-lens quality than to zoom-lens compromise.

The design also lines up with how the M viewfinder works. An M body's finder shows discrete frame lines (28, 35, 50, 75, 90, 135) selected mechanically when a lens is mounted. There is no frame line for 32mm or 40mm or 45mm because there's no continuous range in the finder at all. A true zoom Tri-Elmar would have shot at focal lengths the M finder couldn't frame. The click-stop design isn't a workaround for a missing zoom mechanism; it's the only design that makes optical sense given how the M body itself is built. You can shoot at 28, 35, or 50 because those are the focal lengths the camera can frame.

Tri-Elmar-M 28-35-50mm f/4 ASPH: The "MATE" (1998–2007)

The original Tri-Elmar, introduced in 1998. Three focal lengths (28mm, 35mm, and 50mm) at a constant f/4, in a single M-mount lens designed by Leica's optical team. Eight elements in six groups with two aspherical surfaces. The lens uses an internal mechanical configuration that physically rearranges its optical groups when the focal-length ring clicks between positions; each focal length is essentially a separately optimized configuration sharing the barrel.

Optically the 28-35-50 Tri-Elmar is sharp wide open at all three focal lengths, with corner-to-corner resolution that genuinely matches contemporary Summicron-M and Elmar-M prime designs of the same era. The character is modern Leica: high contrast, clean color, slightly clinical compared to vintage glass but ideal for documentary, travel, and any working situation where you want sharpness and color accuracy you can rely on.

The lens went through two production variants:

• Early E55 filter version (1998–2002). Larger barrel, 55mm filter thread. The original Tri-Elmar as launched. Physically bulkier than later M-mount primes and notably front-heavy on a small body like an M6 or M7.
• Late E49 filter version (2002–2007). Redesigned smaller barrel, 49mm filter thread, more compact and better-balanced on a film M. Optically identical to the E55: the redesign was mechanical and ergonomic, not optical. The E49 is the version most working users prefer.

Both versions exist with and without 6-bit lens coding on the rear mount. The 6-bit codes let digital M bodies (M8 onward) auto-identify the lens and apply the correct firmware corrections for vignetting, color shifts, and so on. For digital-M shooters the coded version is clearly preferable; for film shooters the coding is irrelevant. Many uncoded examples can be retrofitted with paint-on or DIY codes, but factory-coded versions trade at small premiums.

For a single lens that genuinely replaces three primes (and three Summicron or Elmarit primes would together cost five figures used), the Tri-Elmar 28-35-50 is one of the strongest value plays in the M-mount catalog if the three click-stop focal lengths fit your work. See "What They Cost Today" below for current pricing.

Tri-Elmar-M 16-18-21mm f/4 ASPH: The "WATE" (2006–present)

Leica's second Tri-Elmar, introduced in 2006 and still in current production as of 2026, twenty years on. Designed by Peter Karbe to cover the ultra-wide range with the same three-position click-stop concept as the original Tri-Elmar: 16mm, 18mm, and 21mm at a constant f/4. Ten elements in seven groups with three aspherical surfaces. It's not a small lens: at roughly 62mm long and 335g, it's meaningfully longer and heavier than a Summicron-M 35mm ASPH (about 36mm long, 252g), though the barrel diameter is close between the two. Compact for what it does, three ultra-wide focal lengths in one optic, rather than compact in any absolute sense.

The optical performance of the WATE is genuinely exceptional. At all three focal lengths the lens delivers corner-to-corner sharpness that surpasses any ultra-wide rangefinder lens Leica had previously produced, with very low distortion (notably less than the Super-Elmar-M 21mm of the same era) and excellent color rendering. For shooters who want ultra-wide M-mount performance and don't mind the f/4 maximum aperture, the WATE is the reference lens: there's nothing else in the M catalog that performs as well across this focal-length range in a single optic.

One critical buying caveat: an M body's built-in optical viewfinder doesn't show any frame line wider than 28mm. The 16-18-21mm Tri-Elmar therefore requires an external optical viewfinder mounted in the hot shoe for accurate framing on a film body, or on a digital body with only the optical finder in use. Leica makes the "Universal Wide Angle Finder," now covering 16/18/21/24/28mm in a single unit with click-stops matching the lens; current retail is $1,280 new. Of course, on current digital M bodies this is a non-issue for shooters willing to compose off the rear screen: live view frames exactly what the sensor sees at any of the three focal lengths, no external finder or frame-line guesswork required. The external finder still matters for anyone shooting through the optical viewfinder, film bodies especially, but it's no longer a hard requirement the way it is for a rangefinder-only body.

The WATE is offered factory 6-bit coded on all current-production examples. Older examples (2006–2008 production) may be uncoded; verify before buying if you shoot a digital M.

The WATE remains in current production, and is meaningfully more expensive than the 28-35-50 because production volume is smaller, the audience is more specialized, and there's no discontinued-lens depreciation working in a buyer's favor. See "What They Cost Today" below for current new and used pricing.

The WATE is the right lens for architecture photographers, interior shooters, landscape photographers who specifically want ultra-wide M-mount, and anyone who'd otherwise be buying two or three of the Super-Elmar-M, Elmarit-M, and Super-Wide separate primes in this range. Total cost-of-ownership math favors the WATE meaningfully against the three-prime equivalent.

What They Cost Today

Figures below use this site's standard fair-price method: median as the typical used price, 25th-to-75th percentile as the fair range, duplicate listings and special editions excluded. New retail is shown for the WATE, which remains in current production; the 28-35-50 has been discontinued since 2007, so there's no new price to anchor against.

The WATE's used price sits about 24% below new, close enough that a clean current-coded used example isn't necessarily the bargain it looks like on paper once the external finder and any warranty gap are factored in. The 28-35-50, with no new price to compare against, is the more straightforwardly cheaper of the two by a wide margin: full used-market spread on the 28-35-50 runs $2,046 (working but cosmetically marked E55 examples) to $9,739 (mint-with-box late E49 6-bit-coded), and on the WATE runs $4,000 (older uncoded) to $8,600 (current-production coded, mint), but the fair ranges above are where most real transactions actually land.

Operational Notes for Both Tri-Elmars

A few things that apply to both Tri-Elmars and that buyers often don't expect:

• Constant f/4 maximum aperture. Both Tri-Elmars are two stops slower than the contemporary Summilux-M (f/1.4) primes they're notionally replacing. For daylight and well-lit interior shooting this is irrelevant; for low-light hand-held work it's a limitation. Tri-Elmars are travel and architecture lenses, not low-light lenses.
• Frame lines change automatically. On any M body (film or digital) the camera detects which Tri-Elmar focal length is engaged via mechanical coupling and automatically displays the correct frame lines in the viewfinder for the 28-35-50 (or external-finder click position for the 16-18-21). No manual frame-line lever needed.
• The click-stop ring takes some getting used to. If you've never shot one, expect the first few sessions to feel awkward, and you'll catch yourself trying to "zoom" between positions. By the second day of use the click positions become second nature and the operation feels closer to changing lenses without removing them than to using a conventional zoom.
• Resale value holds well. Both Tri-Elmars have historically held their used value better than most M-mount lenses of the same era. The lens design has no direct competition (no other manufacturer makes a click-stop three-position M-mount lens), demand is steady, and supply is constrained because owners tend to keep them.

The Tri-Elmar design is one of Leica's quietly original contributions to lens engineering: a click-stop three-position concept that no other manufacturer has matched and that solves a specific working problem (multi-focal-length travel and documentary kit) more elegantly than any zoom design. Neither Tri-Elmar is the right lens for every shooter, but for the working photographer whose focal-length needs map onto 28-35-50 or 16-18-21, the value proposition is one of the strongest in the M-mount catalog.

Browse current Tri-Elmar-M listings on UsedLensTracker across both variants to compare prices and conditions side by side.