Olympus's third-gen entry OM-D with 4K video and improved AF.
The Olympus OM-D E-M10 Mark III was released in August 2017 as the successor to the E-M10 II, introducing on-chip phase-detection AF — a first for the E-M10 series, which had used contrast-only detection in the Mark II. The 121-point PDAF system improves moving-subject tracking compared to the contrast-only system. 4K/30fps recording was added alongside the existing 1080p capabilities. The 16.1MP MFT Live MOS sensor and 5-axis IBIS are retained. No weather sealing is provided.
The 16.1MP MFT Live MOS sensor pairs with the TruePic VIII processor. The 121-point on-chip PDAF system provides continuous subject tracking. Burst shooting runs at 4.4fps with C-AF tracking and 8.6fps with AFS. 4K video records at up to 30fps. 5-axis IBIS provides approximately 3.5 stops of compensation. No weather sealing. Battery life approximately 330 shots using the BLS-50, body weight approximately 408g with battery and card, single SD/SDHC/SDXC slot.
The PDAF addition is the Mark III's key practical improvement over the E-M10 II: on-chip phase-detection enables faster lock-on and more reliable tracking of moving subjects that the contrast-only system struggled with. 4K/30fps recording extends the body's video capability beyond the E-M10 II's 1080p maximum. The 4.4fps C-AF burst rate is notably slower than the 8.6fps AFS burst, reflecting the computational overhead of continuous phase-detection tracking.
On the used market the E-M10 Mark III is affordable as a compact PDAF-capable MFT mirrorless. Condition checks: PDAF tracking performance in live view, IBIS operation, BLS-50 battery health, and screen condition. The BLS-50 is widely available as it is shared across the E-M10 series and E-PL bodies. The E-M10 Mark IV further improved the PDAF and EVF. Compatible with all Micro Four Thirds lenses from Olympus, OM System, and Panasonic.