OM System OM-5 Mark I vs Panasonic Lumix G100D
Side-by-side used price and spec comparison. Lowest current prices pulled daily from the major used-gear sites.
Today's price sits well above the recent low. Today's price runs 126% above the 90-day low of $239 (seen Sep 5, 2026). 45% of the $1,199 MSRP. Prices are down 15.6% over the last 30 days.
Today's price sits well above the recent low. Today's price runs 37% above the 90-day low of $284 (seen Sep 2, 2026). 49% of the $799 MSRP. Prices have been steady this month.
Quick answers
- Which is cheaper used, the OM System OM-5 Mark I or the Panasonic Lumix G100D?
- The Panasonic Lumix G100D is cheaper used: $389 against $539 for the OM System OM-5 Mark I, a gap of $150 (39%) as of 2026-10-31.
- Why is the older OM System OM-5 Mark I more expensive used than the Panasonic Lumix G100D?
- It is, by $150: $539 against $389 for the newer Panasonic Lumix G100D as of 2026-10-31, with 20 and 8 live listings. When an older model holds a premium, buyers usually prefer something it does that its successor changed, or the newer model is still sold new, which keeps pressure on its used price.
- What share of its launch price does a used OM System OM-5 Mark I cost?
- About 45%: $539 used against a $1,199 launch price as of 2026-10-31.
- Which is smaller, the OM System OM-5 Mark I or the Panasonic Lumix G100D?
- The Panasonic Lumix G100D is smaller: the OM System OM-5 Mark I is 9 mm wider, 2 mm taller, 4 mm shallower and 62 g heavier.
Size and weight
The Panasonic Lumix G100D is 9 mm narrower, 2 mm shorter, 4 mm deeper and 62 g lighter than the OM System OM-5 Mark I.
| Measurement | OM System OM-5 Mark I | Lumix G100D | Difference |
|---|---|---|---|
| Width | 125 mm | 116 mm −9 mm | Lumix G100D is 9 mm narrower |
| Height | 85 mm | 83 mm −2 mm | Lumix G100D is 2 mm shorter |
| Depth | 50 mm | 54 mm +4 mm | Lumix G100D is 4 mm deeper |
| Weight | 414 g | 352 g −62 g | Lumix G100D is 62 g lighter (15%) |
Drawn to scale from manufacturer dimensions. Body only: lenses not included. Outlines are simplified shapes, not product drawings.
Specs side by side
| OM System OM-5 Mark I | Panasonic Lumix G100D | |
|---|---|---|
| Brand | Olympus | Panasonic |
| Family | OM System OM | Panasonic Lumix G |
| Category | body | body |
| Body type | Mirrorless | Mirrorless |
| Mount | MFT | MFT |
| Sensor | MFT | MFT |
| Sensor family | Olympus 20MP Four Thirds Live MOS · 20MP Four Thirds Live MOS | Panasonic 20MP Four Thirds Live MOS · 20MP Four Thirds Live MOS |
| Megapixels | 20.4 MP | 20.3 MP |
| Autofocus | Hybrid | Depth-from-Defocus |
| IBIS | 5-axis 6.5-stop | no |
| Weather sealed | Yes | No |
| Max video | 4K30 | 4K30 |
| Max native ISO | ISO 25,600 | ISO 25,600 |
| Body weight | 414 g | 352 g |
| Dimensions | 125 × 85 × 50 mm | 116 × 83 × 54 mm |
| Body material | magnesium alloy | polycarbonate |
| Released | 2022-10-26 | 2024-02-13 |
| Discontinued | — | — |
| Status | current | current |
| MSRP | $1,199 | $799 |
| Current low | $539 | $389 |
| vs MSRP | -55% | -51% |
The verdicts above describe price timing. They don't tell you which camera fits your shooting style. See /methods for how we normalize seller conditions and compute the deal score.