OM System M.Zuiko 100-400mm f/5-6.3 IS vs Panasonic Leica DG 100-400mm f/4-6.3
Panasonic Leica DG 100-400mm f/4-6.3 has more in its favour on paper. The Leica DG 100-400mm f/4-6.3 gathers more light for low light and background blur; the M.Zuiko 100-400mm f/5-6.3 IS is the alternative.
Choose the M.Zuiko 100-400mm f/5-6.3 IS for
- Similar specs
Choose the Leica DG 100-400mm f/4-6.3 for
- a brighter maximum aperture (f/4-6.3, about 0.6 stops more light)
- less weight (985g vs 1120g)
- a lower price (about £650 vs £750)
| M.Zuiko 100-400mm f/5-6.3 IS | Leica DG 100-400mm f/4-6.3 | |
|---|---|---|
| Brand | OM System | Panasonic |
| Focal length | 100-400mm | 100-400mm |
| Maximum aperture | f/5-6.3 | f/4-6.3 |
| Weight | 1120 g | 985 g |
| Stabilisation | Yes | Yes |
| Weather sealing | Yes | Yes |
| Filter size | 72mm | 72mm |
| Made for | MFT | MFT |
| New price | £1,299 | £1,399 |
| Used at MPB (Micro Four Thirds) | £689–£809 | £544–£754 |
Frequently asked questions
Is the OM System M.Zuiko 100-400mm f/5-6.3 IS better than the Panasonic Leica DG 100-400mm f/4-6.3?
The M.Zuiko 100-400mm f/5-6.3 IS offers similar specs; the Leica DG 100-400mm f/4-6.3 offers a brighter maximum aperture (f/4-6.3, about 0.6 stops more light), less weight (985g vs 1120g), a lower price (about £650 vs £750).
Which is better value, the M.Zuiko 100-400mm f/5-6.3 IS or the Leica DG 100-400mm f/4-6.3?
On Micro Four Thirds, the Panasonic Leica DG 100-400mm f/4-6.3 costs about £650 against about £750 for the OM System M.Zuiko 100-400mm f/5-6.3 IS (MPB used where listed, otherwise new; checked 5 November 2026).
Is f/4 worth it over f/5?
f/4 gathers about 0.6 stops more light, which helps indoors, at night and for background blur. If you mostly shoot in good light, the slower lens is usually lighter and cheaper.
Do both lenses fit the same cameras?
Both are available for Micro Four Thirds. Both are made for crop sensors.