Does the Panasonic Leica DG 100-400mm II take a teleconverter?
2 teleconverters are supported. A teleconverter multiplies the focal length and costs you light — and on a crop body the framing multiplies again.
Read the restriction before you buy: Usable zoom range is restricted, NOT the full 100-400mm. A physical Zoom Limit switch must be engaged to stop the rear element striking the converter, restricting the lens to 210-400mm; with the 1.4x factor Panasonic publishes a usable range of 294-560mm (not 140-560mm). That is a published limit, not a reviewer's opinion — the usable range with a converter fitted is narrower than the lens's own.
| Teleconverter | Supported | Reach | Max aperture | On APS-C | On Micro Four Thirds |
|---|---|---|---|---|---|
| OM System M.Zuiko 1.4x Teleconverter MC-14 | No — Cross-brand; OM System's MC-14 compatibility list enumerates M.Zuiko lenses only. Ship with a 'not officially listed' label rather than a hard denial. | — | — | — | — |
| Panasonic 1.4x Teleconverter DMW-TC14 | Partial — Usable zoom range is restricted, NOT the full 100-400mm. A physical Zoom Limit switch must be engaged to stop the rear element striking the converter, restricting the lens to 210-400mm; with the 1.4x factor Panasonic publishes a usable range of 294-560mm (not 140-560mm). | restricted — see note | f/5.6-9 | — | 280-1120mm |
| OM System M.Zuiko 2x Teleconverter MC-20 | No — Cross-brand; absent from OM System's M.Zuiko-only list. | — | — | — | — |
| Panasonic 2x Teleconverter DMW-TC20 | Partial — Same Zoom Limit switch restriction: lens locked to 210-400mm while a converter is mounted, giving a published usable range of 420-800mm (not 200-800mm). | restricted — see note | f/8-13 | — | 400-1600mm |
What each converter gives you
Panasonic 1.4x Teleconverter DMW-TC14 — 140-560mm at f/5.6-9 on this lens, autofocus retained.
Panasonic 2x Teleconverter DMW-TC20 — 200-800mm at f/8-13 on this lens, autofocus retained.
The lens itself: Panasonic Leica DG 100-400mm II · every Micro Four Thirds lens: Micro Four Thirds lens index · all teleconverter compatibility
Compatibility sourced from the manufacturers' own published teleconverter compatibility statements (manufacturer teleconverter compatibility statements (Sony, Canon USA, Nikon, Fujifilm, Sigma, Panasonic, OM System) — each row carries its own source URL) and verified 2026-08-29. Reach and aperture figures are computed from the lens's own published focal length and maximum aperture — a 1.4x multiplies focal length by 1.4 and costs 1 stop; a 2x multiplies by 2 and costs 2 stops. Lenses whose compatibility we could not verify from a manufacturer statement are omitted rather than guessed. Methodology