Does the OM System M.Zuiko 100-400mm f/5-6.3 IS 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.
Both converters are supported and both stay usable: 140-560mm at f/7.1-9 with the 1.4x, 200-800mm at f/10-13 with the 2x. On a lens this fast the 2x is the unusual case of a 2x that does not cost you autofocus.
| Teleconverter | Supported | Reach | Max aperture | On APS-C | On Micro Four Thirds |
|---|---|---|---|---|---|
| OM System M.Zuiko 1.4x Teleconverter MC-14 | Yes — No lens-specific restriction published. OM System's general guidance notes AF becomes slower with any converter attached. | 140-560mm | f/7.1-9 | — | 280-1120mm |
| Panasonic 1.4x Teleconverter DMW-TC14 | No — Cross-brand. Panasonic's MFT teleconverter documentation names a CLOSED set of three lenses (H-ES200, H-ES50200, H-RSA100400); this OM lens is not among them. Confidence: medium-high — closed-list framing plus the fact that MFT TCs require validated per-lens electronic pass-through, which same-mount physical fit does not confer. NOT a direct denial: no Panasonic sentence names this lens. | — | — | — | — |
| OM System M.Zuiko 2x Teleconverter MC-20 | Yes — AF/IS degradation is more pronounced with the 2x per OM System guidance; no lens-specific restriction published. Becomes 200-800mm f/10-13. | 200-800mm | f/10-13 | — | 400-1600mm |
| Panasonic 2x Teleconverter DMW-TC20 | No — Cross-brand; absent from Panasonic's closed three-lens list. Same confidence caveat as the DMW-TC14 row. | — | — | — | — |
What each converter gives you
OM System M.Zuiko 1.4x Teleconverter MC-14 — 140-560mm at f/7.1-9 on this lens, autofocus retained.
OM System M.Zuiko 2x Teleconverter MC-20 — 200-800mm at f/10-13 on this lens, autofocus retained.
The lens itself: OM System M.Zuiko 100-400mm f/5-6.3 IS · 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